How To Fix Injector Knock

To switch the injectors would tell you if one is the problem as the knock will switch cylinders. If it has, the injector is hanging up (many time due to over-torquing the injector halves or dirt contamination. I now have a couple of other issues. dude thats an Lb7 engine, that means you have a bad injector, chances are was not head gaskets causing the noise, but head gasket problem is very possible. I followed the noise with a screw driver as my stethoscope and found it mostly in the 3 right injectors (looking at the engine) I want to replace because it sounds bad but dont want to spend the money. Other causes are closely related to the three most common culprits, and include dirty injectors, a bad knock sensor, worn rings and valve seals, and the possibility of the engine simply running too hot [source: Allen]. If the injector body, nozzle or internal components are cracked, then a new or refurbished injector is your only option. When this happens, there's less room for the fuel and air, resulting in a change in the compression process. ISL & ISC codes can help pinpoint the problem and save hours of frustration. Idle smoothness. Therefore the burning charge is creating pressure and also being compressed at the same time hence the characteristic diesel knock, just like "pinking" or pre-ignition on a petrol engine which can be caused by advanced ignition timing. You can rebuild the lower end of the engine, but it seems like an engine that has cancer. You can use a set of channel-lock pliers to get the injector out, but be very, very careful not to squeeze down or snap the top of the injector off. The engine management computer operates the injector by applying an electric current to the injector solenoid winding-this causes the needle valve to open, and allows the pressurized fuel to be atomized into the intake airstream. Mine has had an intermittent injector knock since I've owned it- over 9 years now. txt) or read online for free. A restriction of only 8% to 10% in a single fuel injector can lean out the fuel mixture and cause a misfire. Honda vehicles have a tendency to break in certain ways. P0171 is a very common code for any ODB2 vehicle. OK, i know it is on the drivers side, I changed the passenger side first, put everything back together, started, didnt have knock but was still running rather poorly so I assumed that there was a bad injector on drivers side, as mentioned Ford told me i had 3 bad injectors and chances are they wouldnt all be on the same side, so I cann assme. you said loud knock so check that out. When it comes to the proper functioning of the engine, various mechanisms such as the fuel distribution, fuel injection and ignition timing should be co. A bad injector will cause a misfire. In many cases, switching to the mid-grade or premium-grade gasoline will eliminate the knock. it is true that the "knocking" is the nature of the beast, the newer diesels are much quieter than the old engines and if your talking about a brand new truck you. If your diesel injector nailing or knocking noise comes right back after doing a purge, I recommend you rebuild your fuel injectors with the Monark nozzles available on this website. When accelerating and under load blows different degrees of black smoke. to test for injector knock ideally you will have the engine idling and making the noise consistently. P0200 Injector Circuit Malfunction P0201 Injector Circuit Malfunction - Cylinder 1 P200A Knock sensor system of control module N3/10 (ME-SFI control module. Cleaning Fuel Injectors at Home (Step-by-Step) You do not need to go to a professional mechanic to clean your fuel injectors. 653 5 injector solenoid valve cylinder #3 circuit -- open circuit 324 653 6 injector solenoid valve cylinder #3 circuit -- grounded circuit 313 654 5 injector solenoid valve cylinder #4 circuit -- open circuit 332 654 6 injector solenoid valve cylinder #4 circuit -- grounded circuit 321 655 5 injector solenoid valve cylinder #5 circuit -- open. This engine was put into minivans, the Dodge D50 trucks, Mitsubishi cars and trucks, the Conquest (a fast turbocharged version), Mazda trucks, forklifts, marine engines, Isuzus, and Hyundais. Check the wiring from the DME and the output stage of the DME. The signs you have Ford 6. Then restart engine and see if the noise has -moved- with the injector. With water meth injection, the lower temperatures combat premature detonation and increase the octane rating. Only other thing i could point a finger too would be the wrist pin the the piston, which can also cause a knock. Several different kinds of , like fuel injector cleaner that helps to clean not only injectors but dirty combustion chambers too. Scan your codes and follow the chart to determine what the code means. The distinctive knock of a diesel engine is caused by its direct fuel injection system. checked the known issues 2&7 connectors and the harness by the ficm and then I ohmed from the ficm to each injector plug and all of them where 0. jaguarfuelinjectorservice. Injector hold down bolts must be replaced if they are removed, they are a torque to yield bolt. Read more to learn about engine rod knock. Typically, you'll need to dig deep into the engine to either fix the noise by replacing internal engine parts (camshaft or crankshaft) or replacing the complete engine. It won't let me edit the title, can mod fix loud? Ok First off thanks to this forum I found out that i had a cracked injector. The injector pump draws fuel from the feed supply and distributes high pressure fuel to the injectors and the spill. Just took my new motor for a drove and heard a knock. Over time these can build up in fuel injectors, on the backsides of intake valves and throughout an engine’s combustion chamber. As injectors get dirty and the fuel flow becomes restricted, the computer will attempt to adjust the fuel flow by opening the injector longer through the use of its Long Term Fuel Trim function. Basically, engine knock (also known as pinging, detonation and spark knock) occurs when the air/fuel mixture inside a cylinder is incorrect, which makes the fuel burn unevenly. tuning was just to fix the injector issues and now we're getting into a whole new can of worms. 8) Rev X Fix Oil Treatment If the fuel injectors get stuck a lot in your vehicle, Rev X Fix Oil Treatment can help with this problem. I have a 2004 F-150 5. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. ) 3) Fully depress and release the accelerator pedal five times in less than five seconds. In fact, it helps remove accumulated deposits inside the combustion chamber to reduce the risk of spark knock. LB7 DURAMAX INJECTOR RETURN LEAKS!!. How to Replace a Fuel Injector Part of the fuel injection system a fuel injector is reasonable for allowing fuel to enter the engine which is controlled by the car's computer. Rebuilt the filter housing, replaced one injector that bal rate was slightly high, added a lift pump, checked all the lines for kinks, leaks etc, picked the entire harness, had trans redone, even tried a new fuel cap. How to Fix 5 Common Issues on Older Bikes A rod, piston or serious knock is not subtle and you can change the noise by manipulating the throttle. This will cause your engine at WOT to run lean above 14. 7L mega diesel 4x4. The Engine Control Unit (ECU) dictates when the injector should inject fuel into the engine cylinder. Test leaking Fuel Injectors. AndyGreensource 4,599 views. How to Replace Broken Wire Harness Connectors To be honest, this is a quick and simple DIY, but it is a pain in the butt the first time you do it. 4 Injector Circuit Low Input/Short to ground. Anything less will almost certainly result in short term issues with the remaining units. Duramax Injector Failures-Cause and Prevention LB7: Many LB7 owners have had injector issues. For help with Toyota Sienna Evap Codes P0446 P0440 P0441 P0442. Started noticing that as it idled, the knock slowly returned. Does not seem to be doing it at idle in park, or at an idle in drive. For older T1N (2001-2006) used Sprinter vans, here’s the super-short summary of possible mechanical problems to look out for: “Black Death” – The most serious possible problem is injector leakage, a. knock sensor, coolant temperature sensor, mass airflow sensor. How do I fix code P0202? Check the "Possible Causes" listed above. I have been having major power loss and knocking. 0L Engine Misfire, Lack of Power or No Start There are several potential causes for these symptoms. A brand-new fuel injector from AutoZone provides efficient emissions and exceptional performance, so you can rest assured that your engine is receiving the right amount of gas when you make this simple upgrade. Mechanical Noise. See what causes these high pressure injectors to fail in this month's issue of Diesel Power. 5, one of my other trucks has 2-4 bad injectors and it has a injector knock and smokes black smoke like a freight train yet the old motor doesn't care. P0204(M) Injector #4 Control Circuit: Injector #4 or INJ 4 injector bank output driver stage does not respond properly to the control signal. P0325 Knock Sensor 1 Circuit Malfunction (Bank I or Single Sensor) P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single sensor) P0327 Knock Sensor 1 Circuit Low Input (Bank I or Single Sensor). These issues tend to be VERY expensive. Using the Pusher Tool (part of the Fuel Injector Seal Installer), slide the Teflon® seals off of the Arbor and into the groove on the fuel injectors. Other causes are closely related to the three most common culprits, and include dirty injectors, a bad knock sensor, worn rings and valve seals, and the possibility of the engine simply running too hot [source: Allen]. The fuel injectors in your vehicle are designed to spray fuel into the cylinders of your engine where it is combined with air and compressed before being ignited by the spark plug to produce power. This issue is unique to Euro 5 spec'd vehilce's, typically with the part number 295050-0460__ fitted Injectors. Polyetheramine (PEA), by comparison, cleans fuel injectors and valves, and does not increase combustion chamber deposits. But this sounds like it is coming from the top end of. However, if the knock is not prevalent at cold temperature, it may be your VCT phasers. P0263 is an [OBD-II diagnostic trouble code] which indicates that the engine control module (ECM) detected the cylinder number 1 having low contribution to the running of the engine; low power. Low knock at idle, noise gets louder as RPM's increase under a load. Injector #3 Control Circuit: An open or shorted condition detected in control circuit for injector #3 or the INJ 3 injector bank. The central computer system monitors and controls all functions, such as ignition timing, the ratio of the air-fuel mixture, and fuel injectors, that trigger the knocking sound. especially because its there 95% of the timei was gonna get some turbo injectors for it and see if that does anything for it. Several different kinds of , like fuel injector cleaner that helps to clean not only injectors but dirty combustion chambers too. A cable is plugged into the OBD-II J1962 connector and the other end is connected to a scan tool. An octane rating is the measure of a fuel type’s ability to resist premature detonation of the air-fuel mixture in the engine. The symptoms of a bad knock sensor typically occur during heavy loads or at high speeds. Duramax Silverado Injector Knocking Fix 🔨💪🏼 - Duration: 4:15. Up until the 1980's, fuel injection was controlled in most engines by a carburettor. 3l does this at McD's. 5 Diesel I just rebuild my turbo using a thread posted at 'the truckstop. Re: injector pump internals stuck Here is another picture of the pump assembly that I have found on the net. If for some reason one injector gets stuck open or starts opening at a lower injection. However, if the fuel injector goes bad electronically, the fuel injector will need to be replaced. Get a new sensor on line at the best price--they are all the same. A "knocking" sound from a car's engine while it's running is serious cause for alarm. Can anyone shed a little light on the subject. How to repair your A/C system on your. 1995-2003 - Duration: 11:49. A restriction of only 8% to 10% in a single fuel injector can lean out the fuel mixture and cause a misfire. Re: Solved: Injector Rattle / Diesel Knock in Toyota diesel engines Here's my story over injector rattling or diesel knocking. When they checked your injector rates did they also check your desired and actual fuel pressures?. I am looking for suggestions. to test for injector knock ideally you will have the engine idling and making the noise consistently. The inlet manifolds on blue and black engines warp near the egr crossover and oil leaks past the bolt and forms a pool of oil. The truck has a new HPOP, New. The idle felt. oilgelsettlement. Install a High CFM Electric Fan on your 123 Mercedes. Some trucks with injector codes for retarded or advanced DTC Codes have these issues, I have dealt with a few trucks with injector codes that ran fine with no knocking and some that knocked at low rpm with no DTC Injector Codes. The OBD trouble code P0267 is a generic powertrain code common to all vehicles. Language: English Location: United States Restricted Mode: Off History Help. Let me explain; most of the typical knocking and pinging in a diesel engine comes from injector “nailing” and ignition knock. You can rebuild the lower end of the engine, but it seems like an engine that has cancer. It is not uncommon for the seals and nozzles that hold the fuel inside the injector to crack under the high amount of pressure. also loosen one injector line at a time at the injector and if knock stops you found the bad injector. Now compare the resistence of any other injector. One of the most alarming symptoms of a bad fuel injector is the odor of fuel leaking. This case study will help you to diagnose a ‘Spider’ fuel injector that is stuck open due to the PCM having fried and causing one of two things: A misfire condition or an engine hydrolock condition (a no crank condition caused by gasoline filling up an entire engine cylinder). Each of the engine knock causes on the previous page has a specific cure, and most of these fixes are simple. 4 MT on highway (had hardly covered 600 km by then) and the first thing on the highway was filling unleaded / normal diesel at a Shell Fuel pump. if its 2004. If it gets stuck open, it will drag down your O2 level as sensed before your upstream catalytic converter. mine started about the time truck hit 60,000, she has 61,500 on her now{. Buy APDTY 141429 Fuel Injector & Knock Sensor Wire Wiring Harness Assembly Fits 3. It is located at the rear, top of the engine on the driver's side, right above the rearmost injector. Code 1283 may also be stored when the defect is intermittent. It is really annoying. Severe cases require professional cleaning equipment. I've added diesel cleaner to the system once in a while. Automotive Service Bulletins that Help You Fix Cars. by Paul Smith (turbovans. #1 Injector seals fail prematurely (which causes) #2 Short burst of white smoke at start-up #3 Injector miss under heavy load. Only other thing i could point a finger too would be the wrist pin the the piston, which can also cause a knock. It happens during the engine's power stroke, which brings the bearings in contact with the crankshaft. In fact, it helps remove accumulated deposits inside the combustion chamber to reduce the risk of spark knock. just sounded like a gang of midgets under my hood with hammers and was pouring white smoke out of the exhaust. You access these usually by shorting 2 terminals on a diagnostic connector which is sometimes inside the car, sometimes under. Our Days Gone Nero Checkpoint and Nero Injector Locations Guide shares the locations of all the Nero Checkpoints to increase HP, Stamina, and Focus. ) 8/9/01 9:49 am Hi, One method that worked for me on GM generators is to just loosen the injector retainer but don't remove it. It won't let me edit the title, can mod fix loud? Ok First off thanks to this forum I found out that i had a cracked injector. Long story short, both have been changed now with upgrades. 0 hour of labor. 0 turbo duratorq. What causes my Hilux (Prado) injectors to fail? We all know that these common rail injectors are likely to fail at around 120-140,000 km's. While some. 5 Honda engine, 120,000 miles - when first starting in morning car has a ticking or knocking noise. There is a very loud clicking, almost sounds like electricity arcing. You must do this to each cylinder, one at a time. Knock doesnt seem to be there when cold, just when it warms up. Check for any signs of surging or roughness, indicating misfire or improper fuel delivery. Somebody please tell me what is going on here. com, or amazonwireless. Lowering the compression ratio of the engine. ALDL - Assembly Line Diagnostic Link. A faulty knock sensor miscalculates the fuel to air ratio. Cruising from 1400-2000 rpm has a fuel knock, floor it goes away. Somebody please tell me what is going on here. This is a strong all-around product. The truck now has 15,000 miles and the knock is getting worse - even happens some when the engine is warm. Knock sensor out of range: Fuel injector 1,2 or 3 - safety fuel. How to repair your A/C system on your. 5 and when i start it up hot or clold i hear a knocking type noise on the right side of the engine. As soon as I get on the throttle though I can hear it start to "knock" or "whack". 7L mega diesel 4x4. Injector knock. anyone know whats going on or how to fix it?. And if so, what was the fix? Does anyone else think this is a fuel/injector knock?. If there are external fuel injector leaks, the entire fuel injector body must be replaced. Thirdly, unplug the No 3 injector-just the electrical connection- and measure its resistence with an Ohm meter. The idle speed is set incorrectly. Clamp 'Idle Mass Flow' channel to the range [0, 100]%. P0325 Knock Sensor 1 Circuit Malfunction (Bank I or Single Sensor) P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single sensor) P0327 Knock Sensor 1 Circuit Low Input (Bank I or Single Sensor). I have been getting a injector knock from about 1700-2000 rpm for quite some time. If possible, test-drive the vehicle and note any driveability issues that may indicate fuel or spark delivery problems such as hesitation, stumbling, spark knock or signs of misfire. 2) 2E33 Fuel Injector Cyl 4; 2E68 Knock Sensor Signal 1 than 10 hours today for calgary. The location of the knock sensor depends entirely on how effective it will be in catching the noise an engine makes. If these deposits find their way into the Injector you’re in for trouble. Knock sensor problems are common on 1999-2007 Chevy Silverado, Express Van, Tahoe and Suburban trucks. Step 3 - Clean carbon build up. Cause: Stiction in injector(s) Solution: Treat with Stiction Eliminator to clean out all of the injectors. A knocking or ticking noise from your engine is a sign that something is wrong, usually because of a lack of oil. Too late, I traded the Windstar for a Honda. The main cars suffering from injector failure are the 05-07 Hilux/Prado's. Let's find out how to fix rod knock swiftly. 0 hour of labor. It's not a particularly loud noise, ie, it's more of a tick than a heavy thump, but listening with a long screw driver, it is most audible when it's placed on the injection pump, injection pipes and injectors. If normal diagnostics lead to an injector concern, use the following diagnostics to confirm the cause of injector failure and/or to rule out other conditions which may cause the same symptoms as a failed injector. If it has, the injector is hanging up (many time due to over-torquing the injector halves or dirt contamination. 9 l engines are electronic. The guesswork has been taken out of our shopping experience. #4 Injector seats erode away which worsens the problem. One of the most common points of trouble and a common source of reliability complaints with the 6. Former name for GM (only) Data Link Connector, the connector socket into which the scan tool plug is inserted; sometimes used to refer to any pre-OBDII computer signals. This engine was put into minivans, the Dodge D50 trucks, Mitsubishi cars and trucks, the Conquest (a fast turbocharged version), Mazda trucks, forklifts, marine engines, Isuzus, and Hyundais. Diesel knock can be down to injector or injector timing. The fuel injector balance test is performed when a misfire, knock, excessive smoke, or rough running condition exists with no electrical DTCs. With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues. loss of pressure in the lubricating system. See reviews below to learn more or submit your own review. With gas tank at around 1/2 tank, add in the Chevron Techron Engine cleaner. More help for fuel injectors. The injector connectors on the LLY are terrible, and if they get just a tiny bit loose, you'll get a terrible knock. Check that - its first foray into electronically controlled diesel injection pumps on the 6. let it fill the pump and let it sit over night (in a heated garage, atf doesnt like to start cold) and then run the piss out of it the. On older multiport systems that fire the. This will take you directly to the resources we offer to help you fix the problem. or sign up with email About this Discussion. I tried 93 Octans and Lucas injector cleaner and went to a 20-50 GTX oil with Lucas oil treatment with no change in symptoms. When a tree falls on a saw, there is rarely any doubt what happened, but when the engine fails, it is sometimes difficult for pro users to understand what has occurred and why. But, either one will make the knock disappear equally. It's easy to misdiagnose the cause of knock, and there might be more than one cause, so you might have to pay a visit to your mechanic. There are also some vehicles where the knock sensor is installed on the cylinder head itself. Make sure LEDs do not flash for 5 minutes when racing or idling the engine. Abnormal combustion, more commonly known as knock or detonation, has been the limiting factor in internal combustion engine power generation since the discovery of the otto cycle itself. Discussion Starter • #1 • Mar 11, 2005. Fix Finder is an easy-to-use tool to troubleshoot why your Check Engine Light is on using an extensive database of repair solutions from ASE certified mechanics to help you find the most likely fix. Fuse Block and OBD2 Port Wiring Information - Part#'s for parts to build custom fuse block/relay sockets, OBD2 Port. Lucas Fuel Treatment. So i replaced injector harness / main harness and a new ecm from frieghtliner that was a warranty fix for bad readings with those injectors problem is now i am getting fault code spn 723 fmi 11 and spn 723 fmi 8 for cam shaft sensor i have replaced sensor and. Keep in mind, though, that while fuel injector cleaner can help restore your car's performance so that its power and mileage are closer to new, it can't improve your car beyond its original specs [source: Allen]. Hi Guys, I need some input from you fellow Nissians on the above topic. Start by inspecting the wiring and connectors, repair as required. While some. Make sure you open the NAPA box and see it is an Echlins. All changed but #8, line was twisting with flare nutsoaking with blaster at moment to try to loosen up. When using the hydraulics the power is really bad, so working the bucket and moving at the same time is an issue. Honda vehicles have a tendency to break in certain ways. A main knock is a deeper sound that is more pronounced at the bottom of the block as apposed to the top when using a stethoscope. In understanding these common faults, you will be able to identify the problem and carry out the proper fixing as soon as possible. Re: Anyone know how to swap a fuel injector on these? « Reply #1 on: January 10, 2013, 10:33:12 pm » Here's a great picture of the motor expanded out, I would guess pulling the intake and then the valve cover will give you access to remove the fuel rails to access the fuel injector. P0325 Knock Sensor 1 Circuit Malfunction (Bank I or Single Sensor) P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single sensor) P0327 Knock Sensor 1 Circuit Low Input (Bank I or Single Sensor). The fuel injectors in your vehicle are designed to spray fuel into the cylinders of your engine where it is combined with air and compressed before being ignited by the spark plug to produce power. Started noticing that as it idled, the knock slowly returned. If the engine knock has changed or has additional noises, this can indicate other problems, such as failed bearings. com, or amazonwireless. Malfunction Indicator Lamp (MIL) In the Grand Cherokee WJ, the MIL gives an indication to the vehicle operator when the Powertrain Control Module (PCM) has recorded a Diagnostic Trouble Code (DTC) for an On-Board Diagnostics II (OBDII) emissions-related circuit or component malfunction. There are major sources of engine noise. When you first apply power that energy goes into producing a magnetic field, that magnetic field is doing work, and while the magnetic flux is changing it produces a counter-EMF in the coil wire inside the injector. Mechanical Noise. 9900 - comunidades net juwyvuq com unidades net - cached - similar Certain risks, like medical emergencies or unexpected trip cancelation Particular automobile was a lifetime ban Longer see the faces that could very well be that well off financially than you think Garrity thanks to whoever they were offering monthly payments but a few. I'm just wondering if it it a sign of dirty or bad injectors or a sign that the tune on here is trash. Injection timing also can make change in the knock…To much advance of SOI from TDC will increase engine knock. When your engine starts to knock the clock starts ticking! If it's left unattended you could run into severe issues like a blown engine. also loosen one injector line at a time at the injector and if knock stops you found the bad injector. I have have been dealing with this P0171 diagnostic trouble code for many years on many different year make and model vehicles. At engine-light-help. 3) You're using the wrong spark plugs. For example HO2S11 would be the oxygen sensor on bank 1 and first in line (pre catalytic converter) and HO2S12 would be on bank 1, but second in line (the monitor) An oxygen sensor creates a voltage between 0 and 1 volt by means of a chemical reaction between the sensor element and the oxygen in the exhaust passing across that element. A main knock is a deeper sound that is more pronounced at the bottom of the block as apposed to the top when using a stethoscope. To fix this, you can opt for a special injector-cleaning additive, or you can take your car to a shop for more hands-on cleaning. Loud knocking noise. com, or amazonwireless. It comprises 20 oz. If possible, test-drive the vehicle and note any driveability issues that may indicate fuel or spark delivery problems such as hesitation, stumbling, spark knock or signs of misfire. So the slight knock my engine now has after injector replacement is just due to being mistimed now? Will driving it in and out of the garage damage anything? Again it doesn't even knock at idle just runs a little rough, the knocking only starts when rpms go over 900 or so. When accelerating and under load blows different degrees of black smoke. Can you still hear the knocking at 2000+ rpm. The fuel injector, though small, is a very solidly constructed fuel system component part. Marine westerbeke W30 treated fuel system with sea foam. Is this a problem? I checked the injectors with a tecometer, they read fine. I tried 93 Octans and Lucas injector cleaner and went to a 20-50 GTX oil with Lucas oil treatment with no change in symptoms. Ford Tech Tip: Diagnosing 6. Hard knocks that happen at startup and go away quickly are a sure sign it is an early failure and oil related to a rod or main knock, piston slap against the cylinder wall and wrist pin knocks will persist after warm. #2 is usually the first one to melt down and have a compresion problem. See what causes these high pressure injectors to fail in this month's issue of Diesel Power. Replace the knock sensor. Place the Adjustment Ring (part of the Fuel Injector Seal Installer) beveled side first, over the fuel injector tip until it bottoms out against the fuel injector and turn 180 degrees. It takes a rag (to catch a little fuel), a 22mm open end wrench and about 10 min time to remove the old one and replace it with the new one. 4L 4x4 with 53k miles. I haven't done the math, but I suspect it would take a. Everything from puffs to climbing hills unloaded hazing out the back. 653 5 injector solenoid valve cylinder #3 circuit -- open circuit 324 653 6 injector solenoid valve cylinder #3 circuit -- grounded circuit 313 654 5 injector solenoid valve cylinder #4 circuit -- open circuit 332 654 6 injector solenoid valve cylinder #4 circuit -- grounded circuit 321 655 5 injector solenoid valve cylinder #5 circuit -- open. The proper way to fix this is to remove and machine the manifold, but a temporary fix is to remove the 2 centre manifold bolts on the right side of the manifold and apply a sealant to the bolts and replace. Try to isolate which cylinder or cylinders are knocking by loosening up one injector line at a time while the engine is running. Continue with Google. Low knock at idle, noise gets louder as RPM's increase under a load. In August of 2011, BMW recalled 241,000 of its popular 3-Series cars to fix the rear light connections. There are obviously many other things that could cause it but based on description my best bets. Gumout® fuel additives help you restore performance in three primary ways: cleaning carbon buildup on key engine parts, preventing future buildup and conditioning the fuel system to protect engine parts and fuel quality. One of the most common points of trouble and a common source of reliability complaints with the 6. Over time, diesel fuel injectors wear out and fail to close completely. com, myhabit. tappets are harder to diagnose, but the trained ear will know the differance. Do the FICM harness repair Then reread the balance rates and replace the injector the farthest out. If you have an old engine, then you should seriously consider just selling your vehicle for a newer one that has a new engine in it. A hand-held scan tool is usually limited to one OBD-II system type - there are three basic OBD-II protocols in use, each with minor variations on the communication pattern between the on-board diagnostic computer and the scan tool. Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. Find many great new & used options and get the best deals for 12 X Wynns Extreme Powerful Diesel Fuel System Injector EGR Valve DPF Cleaner at the best online prices at eBay!. The engine may have trouble starting, fail emissions, run rough. Re: Solved: Injector Rattle / Diesel Knock in Toyota diesel engines Here's my story over injector rattling or diesel knocking. also before they open it up check your injector balance rates. Below is a list of possible causes for engine knocking. #8 is a different injector to prevent noise. What is the cost to diagnose the P13A1 code Labor: 1. A good injector cleaner, mixed fairly strong, and that usually clears it up for me within a couple of tanks. P13A4 BMW - Super Knocking Cylinder 5 Injection Switch Off. The fuel injectors in Cummins 5. The lifter tick was so loud that the car was returned to me for fear it might fail soon. P0263 is an [OBD-II diagnostic trouble code] which indicates that the engine control module (ECM) detected the cylinder number 1 having low contribution to the running of the engine; low power. The following is an explanation of the fuel knock noise. As the knock got worse, more oil was pissing out the top of the injector and splattering everywhere. Cause: Mechanically failing injector(s) Solution: If the truck continues to run roughly, investigate electrical issues and more serious injector issues. That belarus i went thru was a bear getting all the air out. This may not be the fix for every knock sound that these cp3 fueled engines make, but in this case I've found it to be quite remarkable. If you have an old engine, then you should seriously consider just selling your vehicle for a newer one that has a new engine in it. it started occasionally making a rattle/knocking sound and while doing this, the gas pedal had no oomph. In fact, vehicles have a knock sensor too that detects the sound and communicates the information to the ECU, which then takes corrective measures to fix it. Just rebuilt all eight injectors. I've been digging all over the internet for the past day or so trying to find information. How to Replace a Fuel Injector Part of the fuel injection system a fuel injector is reasonable for allowing fuel to enter the engine which is controlled by the car's computer. 3 Injector Circuit High Input/Short to B+ 16654 P0270 Cyl. Get a free quote today!. This case study will help you to diagnose a ‘Spider’ fuel injector that is stuck open due to the PCM having fried and causing one of two things: A misfire condition or an engine hydrolock condition (a no crank condition caused by gasoline filling up an entire engine cylinder). #1 Injector seals fail prematurely (which causes) #2 Short burst of white smoke at start-up #3 Injector miss under heavy load. 5 psi or better. You can use a set of channel-lock pliers to get the injector out, but be very, very careful not to squeeze down or snap the top of the injector off. Somebody please tell me what is going on here. The actual fuel injector itself can present a problem if it starts leaking. Fuse Block and OBD2 Port Wiring Information - Part#'s for parts to build custom fuse block/relay sockets, OBD2 Port. If the issue persists after reverting back to your original gas station or changing to a new one, it is likely that your motor has significant carbon build up. It does not do it when the engine is cold. Welcome to AM-AutoParts! We've all been to a parts website thinking, "I'm here to get a part that fits my car - this should be easy!" Thirty minutes later, you get up from your computer, without auto parts and dejected. I had the dreaded number 2 knock sensor fail and thought it would be interesting to take some pics. Since water does not burn the same way gasoline does, the piston is not pushing anything upward after the combustion chamber is sprayed with water and causes steam to form. i hope to god it does cuz i dont have the funds right now to pull the motor and replace or rebuild at the moment. The engine management computer operates the injector by applying an electric current to the injector solenoid winding-this causes the needle valve to open, and allows the pressurized fuel to be atomized into the intake airstream. Symptoms of Failing or Broken Fuel Injectors. Abnormal combustion, more commonly known as knock or detonation, has been the limiting factor in internal combustion engine power generation since the discovery of the otto cycle itself. High carbon deposits. At engine-light-help. Injector Knock and Miss on Cold Start However, now that I gotten rid of my coolant leaks, tuned the valves, replaced and reamed the glowplugs and got a hella glowplug relay and ran two diesel purges. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins. With 180k miles, they replaced all injectors. It's not a particularly loud noise, ie, it's more of a tick than a heavy thump, but listening with a long screw driver, it is most audible when it's placed on the injection pump, injection pipes and injectors. A hand-held scan tool is usually limited to one OBD-II system type - there are three basic OBD-II protocols in use, each with minor variations on the communication pattern between the on-board diagnostic computer and the scan tool. It has a knocking noise under load. It has a fairly loud knock on one of the left injectors when the truck is under load. Some engine manufacturers are very specific in their fuel injector design, so only experts can actually help you with this problem. Former name for GM (only) Data Link Connector, the connector socket into which the scan tool plug is inserted; sometimes used to refer to any pre-OBDII computer signals. But might be persuaded to go for 5 new injectors in stead. This company is not yet accredited. Dirty and clogged fuel injectors can cause many problems; starting and idling problems, hesitation, poor engine performance and a loss and reduction in miles per gallon. In order to understand this better, let's delve into the inner workings of the fuel injector. Next step in the maintenance process is the fuel injection or the carburettor cleaner and using either will prevent grime from entering your engine. Fuel injectors do make a noise, but it would usually be described as a “buzzing” rather than a “ticking”. If the injector body, nozzle or internal components are cracked, then a new or refurbished injector is your only option. As you apply the caulk, pause occasionally to let it seep into the crack. Once the injectors itself or the filter basket becomes clogged, no amount of intake or fuel rail induced injector cleaner will resolve the problem. There is an industry-standard set of wire codes in general use by most manufacturers except Yamaha. Some such as overheating, are simple to fix ― just turn your engine off until it cools down. Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. nov09 1st kept get multiple codes po305 misfire #5 found a bad platium plug melted off ,replaced. When this issue comes, engine performance is bit lower than normal. injector question. I have changed fuel filter, checked all fuel lines and bleed the system for air all the way down to the injectors. By collecting data from Honda owners and combining it with information from NHTSA, we can tell you which cars to avoid and what problems happen most. The fuel injector hold-down bolts may get loose or the seals erode, and the injector seals may begin to leak. loss of pressure in the lubricating system. Each of the engine knock causes on the previous page has a specific cure, and most of these fixes are simple. Fuel Injector Replacement Cost Estimates The average cost for a Fuel Injector Replacement is between $622 and $855 but can vary from car to car. Two types of sounds. For those of you who read my other thread, you know that my injector pump is leaking. To fix this, you can opt for a special injector-cleaning additive, or you can take your car to a shop for more hands-on cleaning. Injectors Squirt fuel in the cylinders which is mixed with air at aprixamatly 20:1 (more air than fuel) A knock is caused by. The rod knock sound is similar to a hammer banging or tapping on the oil pan. 0 injector problems Some common signals that you could be needing Ford 6. Houston, Texas 77022 Toll Free USA 888-651-0770 Outside USA 713-722-9200 Fax: 713-691-2071. Combustion Noise. Certain other likely effects of this problem are holes in the fuel tank and failure of the fuel injector. If it is not the cylinder that is out of balance then You will know it is a rod. So whats the remedy for noisy fuel injectors?. Modern computer-controlled injection systems can correct your fuel mixture to prevent knocking, but at the cost of engine performance. Here is a listing of common color codes for Yamaha outboard motors. Inspect the knock sensor. I have checked the FICM. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins. Check the system for codes P0325 and/or P0330. If this precision is thrown off by restrictions, electrical problems or fuel problems, it can cause driveability issues. you have swapped the injectors so maybe there is something in the pump. If you have been using Top Tier fuel and you think that your fuel injectors aren't working properly, then it's time to see your mechanic. Adaptor Ev6 to Nippon Denso Adapts Fuel Injector Adaptor Ev6 to Nippon Denso Please check your connectors to make sure they are correct Ev6 To Nipp. 3 powerstroke, 250K. Jump to Latest Follow 1 - 3 of 3 Posts. If unexplained noises exist the steps below are the most common causes. It's definitely not the same as the noise I hear when an engine 'pings' (spark-knock). This case study will help you to diagnose a ‘Spider’ fuel injector that is stuck open due to the PCM having fried and causing one of two things: A misfire condition or an engine hydrolock condition (a no crank condition caused by gasoline filling up an entire engine cylinder). The idle speed is set incorrectly. Hello, I wanted to get a third set of eyes on my 'issue' and hoping I will come across someone who is experiencing the same issue. Find out why diesel fuel injectors fail and how to avoid it as we see if the injectors are the problem. 3 Injector Knock - OK here's one for you. Basically, engine knock (also known as pinging, detonation and spark knock) occurs when the air/fuel mixture inside a cylinder is incorrect, which makes the fuel burn unevenly. Other causes are closely related to the three most common culprits, and include dirty injectors, a bad knock sensor, worn rings and valve seals, and the possibility of the engine simply running too hot [source: Allen]. As a result,. Malfunction Indicator Lamp (MIL) In the Grand Cherokee WJ, the MIL gives an indication to the vehicle operator when the Powertrain Control Module (PCM) has recorded a Diagnostic Trouble Code (DTC) for an On-Board Diagnostics II (OBDII) emissions-related circuit or component malfunction. Injector is bad. How to repair your A/C system on your. It has 150,000km's on the clock and have had it for just over 3 years- did the norm with oil charges and filters 10. 1 - 6 of 6 Posts. What is the cost to diagnose the P0301 CHEVROLET code Labor: 1. 5 turbo diesel marked that engine forever as unreliable and cantankerous despite the resourceful owners and technicians that have dug in and found reasonable solutions to make the. Place the Adjustment Ring (part of the Fuel Injector Seal Installer) beveled side first, over the fuel injector tip until it bottoms out against the fuel injector and turn 180 degrees. Once the injectors itself or the filter basket becomes clogged, no amount of intake or fuel rail induced injector cleaner will resolve the problem. one is the toxic fume monitoring warning light,the other is the preheating/electronic fault. For the best results, opt for a cleaning fluid that contains polyetheramine (PEA), which will dissolve thick carbon deposits more effectively. 0 TDCi engines the each injector has a 16-digit calibration code stamped on the body. Now compare the resistence of any other injector. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. When symptoms of poor potency appear, men speak positively about Vialiks, but it is important to choose the right dosage of Sildenafil so that there. It's knocking because it is pissing the fuel into the cylinder or the tip is cracked. Read more General Motors. I think the stethoscope is misleading you. Fuel injectors can cause a whole host of problems that can lead to major engine damage if not diagnosed and replaced or repaired as soon as possible. 8) Rev X Fix Oil Treatment If the fuel injectors get stuck a lot in your vehicle, Rev X Fix Oil Treatment can help with this problem. The noise does not affect performance or durability of the part. Somebody please tell me what is going on here. the cold start injector thermo-time switch (red arrow) is used only on the 1985-88 TPI engines. seems to be coming from my fueling injector #2. Severe diesel knocking can,and will, damage an engine: it is caused by a too advanced injection of the diesel; meaning that the diesel is (due to a defect) injected too many degrees before TDC(top dead center),while the piston is still going up; i. Fuel Injector Replacement Cost Estimates The average cost for a Fuel Injector Replacement is between $622 and $855 but can vary from car to car. So i replaced injector harness / main harness and a new ecm from frieghtliner that was a warranty fix for bad readings with those injectors problem is now i am getting fault code spn 723 fmi 11 and spn 723 fmi 8 for cam shaft sensor i have replaced sensor and. For a layperson this seems to be a problem but it is not, the ECU wants to learn the pilot quantity injection and teach it and it goes away. I have been getting a injector knock from about 1700-2000 rpm for quite some time. A visual inspection showed that new spark plugs, spark plug wires, ignition cap, and rotor have been installed. Our Days Gone Nero Checkpoint and Nero Injector Locations Guide shares the locations of all the Nero Checkpoints to increase HP, Stamina, and Focus. The design and labor costs dictate a complete set replacement in most cases. Combustion Noise. I know what you mean with a 6. When this issue comes, engine performance is bit lower than normal. For those of you who read my other thread, you know that my injector pump is leaking. mine started about the time truck hit 60,000, she has 61,500 on her now{. Mercedes Intake Seal Ring Replacement for the Turbo Diesel. The fuel injectors in your vehicle are designed to spray fuel into the cylinders of your engine where it is combined with air and compressed before being ignited by the spark plug to produce power. In this case, loss of fuel efficiency tells you that the engine needs attention. None of the others were doing this, and I could hear #2 knock louder and louder the longer the engine ran. If you've noticed that your car has thick smoke coming out of the exhaust pipe, it may be a sign that your engine needs some attention. A leaky or clogged injector often leads to poor idling and rough startups, and ignoring the resulting engine knock is a quick way to completely burn out your engine. 5 you dont have the lb7 motor which was known to have all the injector problems, im not saying that the injectors are not the issue however. How to Test Fuel Injectors. (Remember that a fuel injector can work properly when cold but go open when hot, or vice versa. I have a 2004 F-150 5. As injectors get dirty and the fuel flow becomes restricted, the computer will attempt to adjust the fuel flow by opening the injector longer through the use of its Long Term Fuel Trim function. ok first thing we are going to do is with all the injectors plugged in one at a time unplug an injector connector put your light to test for injector blink and one at a time test for blink if no blink plug that one back in and then go on to the next one. Adaptor Ev6 to Nippon Denso Adapts Fuel Injector Adaptor Ev6 to Nippon Denso Please check your connectors to make sure they are correct Ev6 To Nipp. The telltale sound of an operating diesel engine is due in part to the fuel injection process. 1996 12 valve cummins bearing knock or injector knock? I'm going to look at a truck that's for sale the owner says it could either be an injector knock or a bearing knock how much are these porblems to fix and how can I tell what the problem is when I go look at it. SEE ALSO: 15 Best Fuel Injector Cleaners. You hear this sound best when the vehicle is cold, or when sound bounces back to you from another car or wall. I believe that may be the cause of the knocking, but asking just to be sure. ALDL - Assembly Line Diagnostic Link. So my buddy who works on Diesel engines had a 15 minute look at it yesterday evening and bled the injectors. The knock sensor communicates with the car’s computer, providing information about the occurrence of a spark knock. As soon as the highway levels out, and the load increases, the knock comes back. You access these usually by shorting 2 terminals on a diagnostic connector which is sometimes inside the car, sometimes under. Knock regulation does not occur until the engine coolant temperature of 40° C (104° F) is reached. Since the main injector is con-cealed by the intake, a noid light cannot be used for no-start diag-nosis. It should be 49. Knock sensor codes generally mean the knock sensor has gone bad. The guesswork has been taken out of our shopping experience. It sounds like a tappet is going to pop out or like the injectors are about to crack. 3L-L4 at the best online prices at eBay! Free delivery for many products!. Engine Knocking. The Fix: Replace the EGR valve. The fuel injector balance test is performed when a misfire, knock, excessive smoke, or rough running condition exists with no electrical DTCs. However, if the knock is not prevalent at cold temperature, it may be your VCT phasers. com website) www. There are two sound types that emerge from a diesel engine. Additives exist which can help stop the knocking sound in engines suffering from combustion chamber deposits and improper gasoline octane. Therefore the burning charge is creating pressure and also being compressed at the same time hence the characteristic diesel knock, just like "pinking" or pre-ignition on a petrol engine which can be caused by advanced ignition timing. The fuel injectors supply fuel directly to the combustion chambers of the engine. When I disconnect the #3 injector wiring the knocking ceases, but of course the engine runs a little rough. Injector hold down bolts must be replaced if they are removed, they are a torque to yield bolt. Once detached, you can either attach the pump to a fuel return line or use a U tube connected to the fuel tank. Get a new sensor on line at the best price--they are all the same. 3l does this at McD's. On start-up in the morning the engine creates a hesistant irratic nailing noise. VP44 injection pump problems are going to happen but we are here to help. Over time, diesel fuel injectors wear out and fail to close completely. he says it holds good oil pressure and the knock is audible at an idle. 0 The cost to diagnose the P13A1 code is 1. However as a leak is a mechanical issue with the injector tip, it could be unrelated. This engine sounds like it's running on one cylinder but in reality one cylinder is dead with way too. 2) Turn the ignition key to the ON position and wait three seconds. Engine knock is among the most disturbing problems a vehicle can have, but not many people know what it is, or how it is caused. The average DIY fuel injector cleaning project and most automotive repair shops does not have the proper diagnostic equipment or the ability to test leaking injectors or clean them properly. Drove the truck slowly back home wasn't but 2 miles away. Most injectors will last for 150,000 to 300,000 miles but that is dependent of several factors including fuel quality, fuel filtering, oil changes, oil quality. 1 V reg HFZ. Severe diesel knocking can,and will, damage an engine: it is caused by a too advanced injection of the diesel; meaning that the diesel is (due to a defect) injected too many degrees before TDC(top dead center),while the piston is still going up; i. check all 8 one at. The Fuel Injector Scale table contains is a singular value used to essentially represent the size (or flow rate) of the fuel injector the ECU is controlling. Anything less will almost certainly result in short term issues with the remaining units. I've been digging all over the internet for the past day or so trying to find information. Fuel injector leak testing should be done under operating pressure. Timing can be down to the ecu, and can have the same effect. However, you know the turbo oil return tube. Certain other likely effects of this problem are holes in the fuel tank and failure of the fuel injector. It takes a rag (to catch a little fuel), a 22mm open end wrench and about 10 min time to remove the old one and replace it with the new one. In understanding these common faults, you will be able to identify the problem and carry out the proper fixing as soon as possible. If you notice a problem, it is important to locate the source. Join the discussion. Have done a search for injector and couldn't find how to replace the fuel injector so if anyone can be kind enough to tell me it will be appreciated :) Cheers. In fact, the symptoms that many attribute to dirty injectors – loss of power, missing on start-up, poor running, increased fuel consumption and exhaust smoke are often not related to injector deposits. 2001, stock, auto tranny, 200k miles will a hutch mod and regulated return really fix this or am i looking at new injectors? sounds similar if not worse to these i'll be back in 12 hours to give more. 1 year ago. Cleaning Fuel Injectors at Home (Step-by-Step) You do not need to go to a professional mechanic to clean your fuel injectors. Leaky Fuel Injector – If a fuel injector overheats and fails, it will cause a leak. Engine knock is among the most disturbing problems a vehicle can have, but not many people know what it is, or how it is caused. Check for any signs of surging or roughness, indicating misfire or improper fuel delivery. If it is not the cylinder that is out of balance then You will know it is a rod. Fix gear ratio calculation causing incorrect traction control and vehicle speed limit operation. But might be persuaded to go for 5 new injectors in stead. For those of you who read my other thread, you know that my injector pump is leaking. When I shut off 7 OR 3 the knock disappears. To do this, your fuel injectors are removed from the engine and thoroughly cleaned. To fix this, you can opt for a special injector-cleaning additive, or you can take your car to a shop for more hands-on cleaning. To diagnose a fuel injector problem you need a keen sense of your vehicle, a little time and some basic fuel injector knowledge. Here are 10 signs to look for when you need to replace a fuel injector or it needs service. For example HO2S11 would be the oxygen sensor on bank 1 and first in line (pre catalytic converter) and HO2S12 would be on bank 1, but second in line (the monitor) An oxygen sensor creates a voltage between 0 and 1 volt by means of a chemical reaction between the sensor element and the oxygen in the exhaust passing across that element. While some. Noisy injectors - how to fix? Jump to Latest Follow 1 - 12 of 12 Posts. Check the wiring from the DME and the output stage of the DME. First off, I can't take the credit for this, because it's. The modern engine has a failsafe mechanism that allows it to adjust the ignition timing in case of the occurrence of detonation. The auto repair labor rates vary widely across the country, and even within the same city. Cylinder Number 1 Contribution/Balance Fault. So I just fix the oil cooler and put new fluids in the system to take it to a shop to get it flushed. When I disconnect the #3 injector wiring the knocking ceases, but of course the engine runs a little rough. The fact that Royal Purple 18000 is the only fuel injector cleaner that also steadies ethanol – the substance that can chemically breaks down to damage your engine – makes it one of the best fuel injector cleaners out there. Chevrolet Silverado 1999-2006: How to Replace Knock Sensors. 0 injector repair are: · Poor start, especially when the engine is cold · Low power · Stalling · Misfiring · Jerking and rough running · Too much smoke The most frequent Ford 6. As you apply the caulk, pause occasionally to let it seep into the crack. The Fix: Set idle speed to the car's original settings. Replace the knock sensor. loss of flow in the fuel system B. Further information from the customer indicated that the truck misfired the worse in drive, not overdrive, at light to normal cruise around 2000 rpm to 2500 rpm. If you’ve got rod knock the sound will change with engine RPM and will not change with engine temperature or load. They are the best out there. It seems to be getting worse. I think the stethoscope is misleading you. It can be a problem in the spark plug or the ignition coil. Hi Guys, I need some input from you fellow Nissians on the above topic. Just took my new motor for a drove and heard a knock. When using stock fuel injectors this table does not need to be altered. Former name for GM (only) Data Link Connector, the connector socket into which the scan tool plug is inserted; sometimes used to refer to any pre-OBDII computer signals. Polyetheramine (PEA), by comparison, cleans fuel injectors and valves, and does not increase combustion chamber deposits. Indirect injection in an internal combustion engine is fuel injection where fuel is not directly injected into the combustion chamber. That is, shortly after doing the lower end, the upper starts with problems. Mercedes Injection Pump O Ring Replacement. Mechanic that did the replacement failed to enter the injector codes before starting the engine, Had no power and lots of smoke and a really nasty sounding knock (like a rod. checked the known issues 2&7 connectors and the harness by the ficm and then I ohmed from the ficm to each injector plug and all of them where 0. Honda vehicles have a tendency to break in certain ways. It is usually precipitated by improper injection timing, bad spray formation by the nozzles, and other malfunction in the fuel injection equipment. A fuel injector is considered to be clogged if the amount of debris or gunk inside the injector or filter basket has built up to such an extent that it does not allow fuel to flow through. 5 Easy Steps On How To Fix Rod Knock Swiftly. Discussion Starter • #1 • May 28, 2010. Started noticing that as it idled, the knock slowly returned. let it fill the pump and let it sit over night (in a heated garage, atf doesnt like to start cold) and then run the piss out of it the. Rebuilt the filter housing, replaced one injector that bal rate was slightly high, added a lift pump, checked all the lines for kinks, leaks etc, picked the entire harness, had trans redone, even tried a new fuel cap. At engine-light-help. The video tells the story on the running condition of this MaxxForce DT diesel engine. 2 Injector Circuit Low Input/Short to ground 16649 P0265 Cyl. Cleaning your fuel-injection system will help clear out the grime and stop the knocking. 6 Liter Engine. Former name for GM (only) Data Link Connector, the connector socket into which the scan tool plug is inserted; sometimes used to refer to any pre-OBDII computer signals. Restrictions. If there is a mechanical problem with the injector, you might not be able to see it unless 1) you pull apart the injector, or 2) it's dumping oil differently than the others. The engine cannot combust properly, which leads to higher emissions and reduced fuel economy. Thermal expansion: All materials have a thermal expansion coefficient, whether positive or negative, within a given temperature range (that coeffic What causies lifter noise 4. I believe that may be the cause of the knocking, but asking just to be sure. P13A4 BMW - Super Knocking Cylinder 5 Injection Switch Off. Some people say you should use fuel injector cleaner in every tank of gas you purchase. Get a new sensor on line at the best price--they are all the same. Started noticing that as it idled, the knock slowly returned. I expect it's coming from an "knocking" injector. A secondary purpose is to dampen or reduce engine vibration so the occupants of the car don’t feel the constant shaking or vibrating of the engine while it’s running. 3 powerstroke, 250K. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model. -New plugs-Filled up at different stations with good gas-Gets a consistent 17 mpg-Runs at 195-210* all day longMy Jeep has had this issue a few times on a COLD start, usually after sitting overnight.