Bad knock sensor cause misfire



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Engine knock can also be cause by bad fuel, so if you hear it, position sensor appears to operate normally. org/forum/topic/116520-knock-sensor-10110/4/2011 · Knock sensor issues are known to cause misfiring in these cars. It could happen at any time: You are driving on the highway, moving As the piston is traveling upwards compressing the air and fuel, the flame front is starting to spread outwards from the electrodes of the spark plug burning air and fuel and building pressure. Armed with the knowledge of what can cause a misfire, rough idle condition and a specific testing strategy, you can easily find out what component is the one that has failed. Second you need to find your missfire. Idles rough (rpms drop) and every few seconds rpms will go back up and it will idle smooth, then goes back to idling rough. bad plug. com The movement of the shaft can cause a cylinder misfire, and the rattling can cause a knock sensor code to set. 1; 2; Often a bad mass air flow sensor causes the engine to run lean causing random misfire. We'll discuss these in-depth on See Bad Mass Airflow Sensor Symptoms. 3/13/2015 · A Look at what may cause the "SERVICE ENGINE SOON" Light or On-Board Diagnostic(OBD-II)Trouble Code(DTC) P0328 and P0304. 7/23/2014 · If the O2 sensor is bad, it should show that code, too- whether it can lean the mixture enough to cause knock is almost academic, but on hard acceleration, it could be base timing, IAC, Knock Sensor, or possibly the ECT sensor, although I didn't see anything about hard starting when hot. Also had a misfire code. Location of MAF Sensor Mass airflow sensor problems can cause a variety of symptoms from the annoying to the must repair. If a code is present for the knock sensor I would inspect that first before chasing other problems. 5/12/2016 · knock sensor cylinder #2 misfire codes Discussion in 'Repair Questions' started by galvanic, Feb 28, 2010. Статус: разрешенОтговори: 6P0300 - OBD-II Trouble Code - RepairPal. You will find the knock sensor …6/23/2007 · A bad knock sensor, or one not sending information to the computer, can cause allot of differant problems. It's not likely for the exhaust leak to cause a misfire - a CEL perhaps for a misreading O2 sensor. org/vbulletin/f66/cylinder-3-4-misfire-71879/6/2006 · If memory serves, the ECU is not supposed to check the knock sensor when the engine is cold. 4 motors did have a history of the rocker bolt pulling out of aluminum head. Dave87gn · 9 years ago . Where is the knock sensor located chevy silverado 4. If you have a knock sensor code you need to get it fixed. The O2 Sensor will cause a random misfire position sensor appears to operate normally. Статус: разрешенОтговори: 4P0303 & P0304!! Random Misfires. The only thing you'd ever notice with this sensor bad would be poorer fuel economy than otherwise, and an infrequent audible "knock" on acceleration. its knock sensor! FIXED!https://sl-i. It is located The knock sensor is located on the engine block, cylinder head or intake manifold. Misfire,Can Oxygen Sensor Cause Misfire,Can A Bad Oxygen Sensor Cause A Misfire,Can A O2 Sensor Cause A Misfire,Will A Bad O2 Sensor Cause A Misfire,Can A bad oxygen sensor will cause the ECU to sense a wrong air fuel ratio. Only one of the cylinders needs to misfire to cause a problem. A Bad Knock Sensor will not cause a misfire, unless the advance is off due to a faulty Knock Sensor. If left unchecked, this bad combustion could ruin parts of your engine. 11/8/2004 · Is it possible for a bad knock sensor to cause mild to serious misfires? I've got 2 new knock sensors on the way since the front one is bad but today out of no where the car just got really bad with misfires and extreme performance drop. This will send the wrong fuel inject into the cylinders and thus the engine will run bad, either causing a miss fire or burble. not sure if that behavior would be undone if the knock sensor is bad, though. It depends on the cause. Chevrolet Tahoe Misfire. Feb my 2000 X has had a rough idle for a couple of months-I took it to Advanced and got 2 codes bad knock sensor & cylinder 2 mis-fire---would any of these cause …9/27/2014 · Will a bad knock sensor cause a misfire. I know, not another misfire thread But all my searches pretty much bring up the usual suspects, or the 1g/2g swap which is already well documented A failing camshaft position sensor (CMP sensor) can produce a confusing range of problems, depending on the way it fails and the model of the car: An intermittent or complete CMP sensor failure while on the road could be dangerous. Soldered all the connections. For me it was the knock sensor A lean fuel condition can be diagnosed by watching for lean misfire on an ignition scope, or by using a four-gas infrared analyzer and watching exhaust oxygen levels. There are 10 diagnostic trouble codes that can be set, ranging between P0325 through P0334 How to determine if these sensors are malfunctioning. You will feel, and maybe hear, this as a brief stutter in the engine. But I'm not sure if the knock sensor is being tripped by another problem or if it's the problem itself. regalgs. part store man thought that was a bad idea and may end up causing more damage. 02 percent. A bad knock sensor causes a decrease in acceleration and fuel mileage. The vehicle will often shake or vibrate and misfire when the engine is started. Can Knock Sensor Cause Cylinder Misfire. Can A Dirty Maf Sense Cause A P0300. car is Fixya. A misfiring cylinder in a four-cylinder engine is, pardon the pun, hard to miss. The knock sensor …Статус: разрешенОтговори: 8Knock sensor 101 and replacement - ultimatesubaru. Would a bad camshaft sensor cause only one cylinder to misfire? malfunction in the cruise control system (sometimes a bad throttle position sensor) or the computer. 8/7/2015 · First thing is DO NOT REPLACE KNOCK SENSOR. It will set a code, but is designed not to throw up a check engine light. 22 May 2018 Your car's knock sensor is a small part that can save you from a big repair bill. ultimatesubaru. subaruforester. The knock sensor is located on the engine block, cylinder head or intake manifold. What is a knock sensor? A knock sensor is used to detect engine knocking or pinging, which results from abnormal combustion in the engine cylinders. Helpful It is possible a faulty camshaft can cause a misfire. The wild card is what the ECU chooses to do when it can't rely on the knock sensor to protect your engine. 11/27/2010 · At first I considered just replacing the knock sensor. car is missing change the plugs no help codes are misfire and knock senser sometimes a #2 o2 sensor. The knock sensor …Статус: разрешенОтговори: 8P0327 Knock Sensor DTC Code - OBD-Codes. The PCM uses this signal to alter the ignition timing and prevent detonation. com/articles/Diagnosing_Misfires. 8 2002? The knock sensor is located on top of the block in a 4. Another symptom of a faulty knock sensor is the misfiring of the engine on A faulty knock sensor will cause your vehicle to display obvious symptoms. a misfire can be many things. Well, I will explain to you what a knock sensor does, but before I do that you may want to know that depending on the state you live in a failed knock sensor will result in a failed DEQ slip. net/FORUM/showthread. Also a problem with the wiring harness or computer can result in a “failed knock sensor” code or indication to show up. Most vehicle owners complain about a rough idle or a misfire when the engine is cold, and as the engine warms up the problem goes away??? But, leaving your check engine light on, with codes PO300, PO171 and PO174. comhttps://repairpal. Autopartswarehouse. To little oxygen may be present in the exhaust gas may be caused by things like a clogged air filter, a failing mass air flow sensor (causing too much fuel to be introduced to the motor), bad fuel injectors or a clogged catalytic converter. It is used to detect engine knock or detonation (there is a piezoelectric element inside the sensor). reference. com/question/index?qid=20071013154917AA74h4110/13/2007 · Mejor respuesta: A knock sensor code is a P0325. 5/29/2010 · Can A Dirty Maf Sense Cause A P0300 Facebook; YouTube; Twitter; Archived. com explains that the knock sensor has a direct effect on the engine’s ignition timing. The spark plugs and ignition wires would be the best place to start to straighten out the misfire. obd-codes. orghttps://www. They told me it was the Knock Sensor and a cylinder misfire (cylinder 1). For example, if the misfire is caused by a bad on-plug ignition coil, which is quite common on many newer cars, the repair might involve replacing a bad coil and all the spark plugs 8/7/2009 · The "check engine and trac control" lights went on, and knock sensor #2 was dx'd as bad, so that was replaced. Ford Inline Six, 200, 250, 4. 9/6/2006 · If memory serves, the ECU is not supposed to check the knock sensor when the engine is cold. A automotive engine Knock sensor can go bad/fail if it’s abused (dropped) or handled roughly, and sometimes if it is removed incorrectly. Bad knock sensor keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on …9/14/2009 · Best Answer: Please don't press me for a logical explanation, but I suspect that once the knock sensor code is fixed (reseat connector, replace sensor, whatever) the cylinder 4 misfire may disappear. Thumbs up. answers. a bad maf ( mass air flow ) would and can set random multiple misfire codes, lean bank 1 and 2 just like a clogged Other symptoms of a bad oxygen sensor include a rough idle, a misfire, and/ or hesitation when trying to accelerate. Could the dirty MAF sensor have caused the misfire issure? Thanks in advance guys. This depends on how bad the car is running. (knock sensor), which may be heard as a mild to severe engine ping usually sounding worse on acceleration. Bad Spark Plug Wires. 2 wks later, the same issue happened - no 4th gear/bad knock sensor…10/27/2009 · Can a bad 02 sensor cause a cylinder to misfire? There was also a bad o2 sensor code as well. That's how it's supposed to work!5/4/2012 · Would a misfire cause a knock? Tech Discussion GTRPWR start the engine let it run for a bit until the temp gauge starts to move then it will start doing the rough idle/miss/knock. The ECM advances the timing until it hears a knock then backs down a little for fuel econ. If the misfire occurs during higher speeds, it could be a problem with the operation of the overdrive gear or a chattering clutch in the Lockup Torque Converter. I have seen random misfire codes and o2 sensor faults set. No mechanical problems were found on the engine. Cutaway on right shows a detonating cylinder, where the last portion of the air/fuel mixture self-ignites and collides with the normal combustion front. That is to say combustion may be disrupted. Also - it's the Front o2 that does air/fuel, and is the one to replace, not the rear. Installed the MSD coil on my 99 Subaru Legacy GT. Tired of losing your Keys? What about your Wallet, Glasses, or those pesky Remote Controls? Introducing our Patented Find One Find All ® Key Finders, or FOFA ® (foh-fah) for short. com/question/index?qid=20080618112704AA2LG3b6/18/2008 · Knock sensor and engine misfire? Well, i went down to autozone as a recommendation from a couple of you and they checked what was causing my light to be on. There are several other symptoms indicative of a knock sensor problem. Статус: разрешенОтговори: 4Can a bad or non-working oxygen sensor cause an engine https://es. P0301 - Cylinder 1 Misfire Detected. the random missfire is setting the knock sensor code and is a waste of money to replace. Lack of proper spark timing can cause a different problem: one or more of the cylinders may misfire. stuck lifter. Here we’ll lay out the cause and correction of the knock sensor problems on these vehicles. com/obd-ii-code-p0300One common cause for "jerky" performance that feels like a misfire is a problem in the transmission and its ability to properly up- or down-shift. I have fixed many of the Nissan V-6 engines with this same problem by replacing the distributor. php?14910-P0303-amp-P03043/22/2012 · Okay, so here is the deal. This is The Basic Function. Problems with acceleration, engine misfires, reduced fuel mileage, stalling and difficulties starting the vehicle are all possible symptoms of a bad crankshaft sensor, according to 1A Auto. yahoo. A finely tuned fuel injection system with an oxygen sensor can maintain an air/fuel ratio within a close tolerance of . Feb my 2000 X has had a rough idle for a couple of months-I took it to Advanced and got 2 codes bad knock sensor & cylinder 2 mis-fire---would any of these cause …Some of the many complaints from drivers when there’s an issue in this system include engine ping, rough running when cold and lack of power due to incorrect ignition timing. htmldiagnosing misfires Misfire is a common driveability problem that may or may not be easy to diagnose, depending on the cause. The knock sensor can be damaged and fail if it is over tightened during service or replacement. I haven't checked the plug on cylinder 6 yet, but the wire looks fine. automotiveforums. What could be causing the random misfire codes? The first 1 Jan 2018 Engine detonation happens during the internal combustion process if the gasoline in the cylinder explodes and then changes the ignition A knock sensors function and symptoms are discussed. First check your knock sensor to see if it's dead or out of spec, while you got the ohm meter on it tap it GENTLY to see if the reading changes. That's how it's supposed to work!Knock Sensor. This is Oct 13, 2015 In this video I talk about an easy way to test the knock sensor. This is because its function is to sense vibrations caused by engine knock or detonation. Recently my car had a bad knock sensor and o2 sensor I changed them then the check engine light went off then it came back on for misfire in all cylinders but the car 10/13/2007 · Best Answer: A knock sensor code is a P0325. 8/10/2003 · The knock sensor only tells the EEC to retard the timing slightly and momentarily, but you can easily identify a bad one by simply unplugging it. The O2 Sensor will cause a random misfire. If the knock sensor is bad you will get detonation. For example, if the misfire is caused by a bad on-plug ignition coil, which is quite common on many newer cars, the repair might involve replacing a bad coil and all the spark plugs 6/24/2009 · A defective knock sensor will not cause a poor idle, since the computer mapping takes the idle speed timing back to the baseline. 6/29/2011 · The anti-knock sensor would not cause a plug misfire. 9/14/2009 · Best Answer: Please don't press me for a logical explanation, but I suspect that once the knock sensor code is fixed (reseat connector, replace sensor, whatever) the cylinder 4 misfire may disappear. A) Symptoms of a bad knock sensor include a sluggish engine, poor acceleration and poor fuel economy. Jan 4, 2016 One symptom of a bad knock sensor is the engine doesn't feel right while driving on the highway, and cause the vehicle to lose fuel mileage. Both are fairly common problems. The intake will have to be removed to get to the sensor. The Knock Sensor is a device that senses engine ignition knock and that data is the engine because of low octane fuel or just a bad load of gas. low compression. 6/7/2007 · To temporarily solve the problem I put a 550K resistor in parallel with the bad sensor, and this worked fine. If …How to Fix a Misfire Easy step by step guide on how to troubleshoot and repair an automotive engine cylinder misfire P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308, though appearances may vary, the process is similar for most vehicles. After feeling the 'steady' misfire, I'm curious if the problem might be a bad ignition coil on cylinder #2. Knock sensors rarely fail outright and more often get “soft” over time and cause false signals to be sent to the ECU, which thinks the engine is knocking when it’s really not. The oxygen sensor is one of the most important elements of the modern fuel injection systems. com/p0327P0327 Knock Sensor DTC Code Technical Description. A faulty knock sensor can cause engine hesitation, or jerking, while in gear. NO but a misfire can cause a knock sensor code. 1/23/2012 · Could the changes made from the car not detecting a knock sensor cause something to go wrong to cause the misfire to happen on cylinder 6? The plugs/wires were changed about 25k miles ago. 0. After a cold start on the dashboard always appears check engine light. believe I replaced wires coil pack and plugsturned out to be the vss going bad. . Just now getting ready to replace the sensors as I need to go in anyway to take care of an injector problem. The main function of a vehicle’s knock sensor is to sense for vibrations that are caused by the detonation or knock of the engine. Wondering if this can help me narrow down cause of misfire and/or knock sensor code. Can A Bad Knock Sensor Cause Misfire,Can A Knock Sensor Cause A Misfire,Knock Sensor Cause Misfire ?,Can Bad Knock Sensors Cause A Random Missfire,Can Cylinder 3 Misfyring Trigure A Knock Sensor To Be Faulty,Could A Knock Sensor Cause Backfire The knock sensor is a technically advanced sound sensor in the engine that adjusts the timing of the ignition, enabling a smooth ride. Before you conclude that the crankshaft position sensor is bad …Knock Sensor. comhttps://www. A bad crankshaft sensor may also cause the vehicle to idle roughly or make the check engine light come on. A bad knock sensor may also not let the engine accelerate properly while driving on the highway, and cause the vehicle to lose fuel mileage. A lean mixture will be read as rich and vice versa. 4 Jan 2016 One symptom of a bad knock sensor is the engine doesn't feel right while driving on the highway, and cause the vehicle to lose fuel mileage. The cam & crankshaft sensors can cause the computer to throw misfire codes if they are intermittent, and not throw the specific code showing these sensors are going bad. May 22, 2018 Your car's knock sensor is a small part that can save you from a big repair bill. If …9/14/2009 · Best Answer: Please don't press me for a logical explanation, but I suspect that once the knock sensor code is fixed (reseat connector, replace sensor, whatever) the cylinder 4 misfire may disappear. it will feel like a misfire but should not cause a single cylinder misfire code. A vehicle knock sensor is a sensor screwed into the engine's block or cylinder head. Therefore, it is important to recognize the symptoms displayed by a faulty knock sensor to prevent the engine from severe damage. a bad maf ( mass air flow ) would and can set random multiple misfire codes, lean bank 1 and 2 just like a clogged 5/12/2016 · knock sensor cylinder #2 misfire codes Discussion in 'Repair Questions' started by galvanic, Feb 28, 2010. 8 2002engine. I have the same problem with a 2003 kia rio po302 # 2 misfire but also have code po113 , I don,t know if they affect one another po113 is a IAT senor that i replaced but all the plugs looked great and wires are pretty new if you fined out anything please let me know and i will do the same bob newjerseyguy64@comcast. Any reputable mechanic would be looking at the #6 and #1 fuel injectors. Take a look at the wire, plugs and the distributor cap, rotor and distributor itself …5/4/2012 · Would a misfire cause a knock? Tech Discussion GTRPWR start the engine let it run for a bit until the temp gauge starts to move then it will start doing the rough idle/miss/knock. burned valve. The knock sensor …Статус: разрешенОтговори: 8Cylinder 3 and 4 misfire - Subaru Forester Owners Forumhttps://www. The motor cost a little over 2k plus a new distributor and injector spyder and all filters and fluids and knock sensor and temp sensors and gaskets. This troubleshooting TECH tip repair is mostly causing a Knock sensor code Автор: sTeVeXNYCPerformanceГледания: 38KWhat Are the Symptoms of a Bad Knock Sensor https://www. It's not real bad but you can see the engine jerk and the hood prop rod shaking. Rough idle, check engine light (random misfire, knock sensor). It could be a bad coil or a vacuume leak. bad coil. Can A Bad Or Nonworking Oxygen Sensor Cause An Engine Misfire P0306 misfire on #6, knock sensor, engine shaking. bad wire. Faulty knock sensors may send incorrect signals to the ECU, causing it to change ignition timing, which in …The main function of a vehicle’s knock sensor is to sense for vibrations that are caused by the detonation or knock of the engine. you can helicoil the bolt hole as a fix. If you had an OHM's meter check the resistance in all the ignition wires. keyword-suggest-tool. Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. TLDR: 3 codes: Knock sensor, cylinder misfire, and EVAP leak. This condition is a 10/13/2007 · Best Answer: A knock sensor code is a P0325. By cclark, May 28, 2010 in 1999-2013 Silverado & Sierra 1500. The knock sensor is a technically advanced sound sensor in the engine that sensor reacting to even the regular vibrations of the engine, causing faulty readings. When a misfire occurs in the engine, it will automatically set the check engine light and show a number. After 50,000 miles or so, OEM carbon-core ignition wires develop too much internal resistance, which weakens the spark and increases the risk of misfire. What could be causing the random misfire codes? The first May 24, 2016 When a knock sensor goes bad, the symptoms will usually be noticeable In rare circumstances, cheap or dirty gasoline will improperly cause the Other symptoms include an engine misfire when trying to start the engine or A knock sensors function and symptoms are discussed. Статус: разрешенОтговори: 6Is it even possible for a knock sensor to cause a misfire www. Depending on the model I have also seen them cause automatic transmissions to loose overdrive. a bad O2 sensor can give a faulty signal to the computer that can give a bad mixture to the cylinder that could cause a ping-knock. Since it is a random misfire I would lean towards a vecuum leak. Talking with many different mechanics who specialize in Chevy the random misfire is 95% of the time caused by a bad O2 sensor. Other common possibilities are a dirty or . A Bad Knock Sensor will not cause a misfire, unless the advance is off due to a faulty Knock Sensor. and so on. Everything ran fine, except when hitting 70MPH or so in 5th gear, it will flick the CEL light on. 9L / 300 - Symptoms of a bad knock sensor - Hi, All. Статус: разрешенОтговори: 8DIAGNOSING MISFIRES - OBD-IIwww. Bad spark plug wires are another common cause of misfires. If you notice these things happening, you should have a certified mechanic from YourMechanic inspect why the car is slow to accelerate . Other symptoms of a bad oxygen sensor include a rough idle, a misfire, and/ or hesitation when trying to accelerate. Engine knock can also be cause by bad fuel, so if …Is it even possible for a knock sensor to cause a misfire at idle only? - posted in Almost Anything Goes: I know this sounds stupid but i just scanned my car with hp tuners and it came up with a bad knock sensor code and a code for some fuel theft signal code. This topic is now archived and is closed to further replies. Haven't heard of a bad camshaft position sensor causing this, though. net Drawing on left shows completion of normal combustion. This condition is a For example, the misfire code could be caused by a bad Coil-on-Plug (COP) ignition coil, or a bad fuel injector, or in one engine cylinder having very low compression, and the list could go on but I …2/3/2007 · Would a faulty knock sensor cause a petrol misfire? I took my RR to the local specialists today for a mini-serivice (oil and filter change) and to try to find out why it ran so rough on petrol (misfiring and backfiring). Many times misfiring is due to issues with the spark plug, but if the sensor fails then the computer is …10/16/2011 · According to thefactory Service manual the engine coolat temperature sensor is something that, when bad, can cause a rough idle, misfire, and general porr running of the engine. It is usually accompanied by a P0340, since the knock sensor will not cause your warning light to come on. 1. I have 03 audi a4 and always get cylinder 4 misfire. i do agree, a failing knock sensor can cause a misfire after timing has been A Bad Knock Sensor will not cause a misfire, unless the advance is off due to a faulty Knock Sensor. I replaced the coolant temp sensor, o2 sensors, cleaned and re-soldered all 10/7/2009 · Is my computer bad or my knock sensor is bad? Or none of these? Username or Email Address Do you already have an account? No, create an account now. Hello, about two months ago I have a problem with the knock sensor on my 2004 Mazda 3. Misfire on Cylinder 5/Knock Sensor - Car Forums and Automotive www. com/vehicles/symptoms-bad-knock-sensor-f6577The symptoms of a bad knock sensor typically occur during heavy loads or at high speeds. The intake gaskets are pretty common to leak. A bad oxygen sensor will cause the ECU to sense a wrong air fuel ratio. share | improve this answer answered Dec 23 '14 at 14:596/18/2008 · Knock sensor and engine misfire? Well, i went down to autozone as a recommendation from a couple of you and they checked what was causing my light to be on. com/search/can+misfire+causeSOLVED: Will a bad knock sensor cause a misfire. jmostar Posts: 2. One common cause for "jerky" performance that feels like a misfire is a problem in the transmission and its ability to properly up- or down-shift. Thumbs down. Engine knock can also be cause by bad fuel, so if you hear it, 20 Jan 2010 Should unplugging the knock sensor cause a misfire ?? . 1999 maxima thanks for your help. the 3. Share this postThe knock sensor can be damaged and fail if it is over tightened during service or replacement. I replaced the coolant temp sensor, o2 sensors, cleaned and re-soldered all NO but a misfire can cause a knock sensor code. Keep in mind, however, that these issues can also have other causes that have no relation to the health of a vehicle’s oxygen sensors. htmlMisfire on Cylinder 5/Knock Sensor Villager Car Forums. Статус: разрешенОтговори: 4knock sensor and engine misfire? | Yahoo Answershttps://ca. Yes, my password is: Forgot your password? Stay logged in Can knock sensor cause cylinder misfire? Results 1 to 5 of 5 Thread: Most vehicle owners complain about a rough idle or a misfire when the engine is cold, and as the engine warms up the problem goes away??? But, leaving your check engine light on, with codes PO300, PO171 and PO174. Can anyone on the board tell me (from 1st hand experience, preferably) the specific symptoms that a bad knock sensor causes at both idle and running speeds? WHAT IS DETONATION? Detonation (also called "spark knock") is an erratic form of combustion that can cause head gasket failure as well as other engine damage. obdii. Faulty knock sensors may send incorrect signals to the ECU, causing it to change ignition timing, which in …But the cause might be anything from a hard-to-find vacuum leak to dirty fuel injectors, low fuel pressure, a weak ignition coil, bad plug wires, or compression problems. An engine misfire means lack of combustion, which can be a result of many things, like bad fuel quality, low compression, lack of spark, or unmetered air entering the entering the engine. org/isa-knock-sensor-to-cause-a-misfire-at-idle-onlyIs it even possible for a knock sensor to cause a misfire at idle only? - posted in Almost Anything Goes: I know this sounds stupid but i just scanned my car with hp tuners and it came up with a bad knock sensor code and a code for some fuel theft signal code. com/t895942-misfire_on_cylinder_5_knock_sensor. Статус: разрешенОтговори: 6Can misfire cause engine knock" Keyword Found Websites https://www. Because anything from a BAD COP Coil to low engine compression can cause a misfire. A reading over about 3% to 4% oxygen would indicate a lean fuel condition. Well, troubleshooting and solving a misfire doesn't have to be hard. February 2010. Runs sweet as can be on LPG!Knock Sensor. Even a dirty MAF sensor can cause a lean code and/or misfire to occur. What finally fixed it was replacing the anti-knock sensor in the back of the engine