G35 Misfire No Codes

Here's our issue. very hard to define especially when u dont have access to all the gadgets to run the tests. Codes related to engine misfires. Dealer suggested I change plugs. I filled it up with some Mobile premium gas and drove it home, and it still didn't run super well. Post got moved so Ill rewrite it. Comp is equal on all cylinders at 155 psi. How Do You Fix a Cylinder Misfire? Fix a cylinder misfire by determining where it is occurring, diagnosing the problem and replacing defective parts. Misfire with no code and new coils and spark plugs. Had a misfire code on 5. Infiniti G35: i have a multiple misfire code, the car goes…. I do have a slight exhaust leak (gasket that needs changed) but not enough of one where it's throwing a code for the O2 sensor Fuel mileage as of late has been between 30-34mpg, all highway, depending on weather and traffic. I've been trying to figure this out on my own with no luck. The 2011 Ford Escape has 4 problems reported for misfire under load. Ford misfire codes and engine temperature trouble codes. Engine Misfire or Rough Idle on GM 4. I find this very odd, as there are no sensors that are giving errors. The 2011 Ford Escape has 4 problems reported for misfire under load. If the Engine System has a Misfire Counter for specific cylinders on the Scan Tool Data Stream, pay very close attention to the cylinders(s) named in the misfire code(s). Fault codes indicated misfire. Lack of power upon acceleration. Wow i just bought the car with 90,000 miles. No codes, intermittent rough idle and rare misfire was created by DanB - 2001 Taurus w/ DOHC V6 24v Duratec, 158,000 miles - I just bought it and know a little about the maint. Okay, found a bad MAF sensor, replaced, it got more power, but still has a miss at idle and lacking a little power when you step on it. Average failure mileage is 61,300 miles. Normal misfires may be unnoticed, but a long sticking engine misfire is difficult to miss. and no codes at all now. If I move one that goes bad the miss follows it. Hope it is just water causing ur issues. Otherwise it runs fine. NOTE#1: It is sometimes easy for non-professional mechanics to confuse P0300 with codes P0301 through P0312, which all refer to consistent misfires on a specific cylinder. The good news is that testing a misfire code, or misfire codes, or a rough idle condition is not that hard and it's something you can do! In this tutorial, I'm going to explain in some detail the most common causes of misfires and misfire codes (P0300, P0301, P0302, P0303, P0304 -OBD II equipped 1. I had this happen on mine. and flashing CEL, but no code yet. I told him to come over and I'd help him out. Re: 2004 F150, misfire, no power. But this doesn't produce any CEL, any check engine light, or any code or any codes. With an OBDII code reader, we can retrieve this data. I do have a slight exhaust leak (gasket that needs changed) but not enough of one where it's throwing a code for the O2 sensor Fuel mileage as of late has been between 30-34mpg, all highway, depending on weather and traffic. Motordyne G35 9,820 views. 5L EcoBoost engine may exhibit a misfire, lack of power, no start and/or illuminated MIL with diagnostic trouble codes (DTCs) P0351, P0352, P0353 and/or P0354 stored in the powertrain control module. Swapped injectors, left to right, no change. The Fix: While the car was running I removed each of the wiring harnesses from the coil packs and took note of the engine's behavior. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. No OB codes found on scanner. While driving home, the whole vehicle started to shake violently, and the engine light came on (flashing). That's right! NO CELs, no check engine, and no codes. Pretty generic code for misfires, pretty much means "misfires are detected. If this problem came about over time, it could be that your throttle body is very carboned up and not allowing the minimum air rate. Swapped all coils from left to right in order, no change. Also gonna check all the hosesno apparent vacuum leaks, but you never know. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If there is not a Cylinder Misfire Counter, then you might have to switch components—such as coils, spark plugs, etc. Most vehicles have either 4 or 6 cylinders. Right but instead its backwards. Misfire & EGR test. Codes Related to P0300. When it misfires, the car shakes, the first time it happened I thought someone tapped my car. The P0303 Infiniti code means that the cylinder 3 is misfiring or is randomly misfiring. One of the six coil packs produced no change in engine behavior when it was disconnected. Normal misfires may be unnoticed, but a long sticking engine misfire is difficult to miss. 5GT that has had all plugs, wires and the coil pack replaced in January. The spark plug uses an electric spark to ignite the flammable air/fuel mixture, producing energy. (not the solenoid control). Scanner shows misfire is on no. A shorted or open fuel injector solenoid, or a shorted or open coil, will usually set a code, but a dirty or weak fuel injector or a weak coil probably will not set a code. It's still not generating any useful codes - only the misfire codes. And, it's not just a code since the engine runs bad like a misfire. Drivers with a misfire will often complain about a lack of power, sputtering or rough engine idle. If I move one that goes bad the miss follows it. You may want to pull the valve cover off, fortunatly the bank 1 valve cover is REALLY easy to get off check and make sure the rockers are all in place. Below you will find the most complete list of BMW trouble codes available. That included spark plugs, ignition wires, transmission fluid, fuel filter, air filter and some other things. This can cause the vehicle to idle so slow that the engine will set misfire codes. In cases where there is a cylinder misfire code but no other codes, the ignition or fuel delivery system may be borderline and not yet bad enough to set a code of its own. It also causes the engine to run. If there is not a Cylinder Misfire Counter, then you might have to switch components—such as coils, spark plugs, etc. 0 may differ. I didn't replace the timing chain either. The problem is to find out which coil (s) is the bad one, most Nissan vehicle owner replaced all six coils at the same time. First thing to check was spark plugs. I have had it scanned now 6 times and have no codes tha. (not the solenoid control). At first it was only occasionally but it seems to be happening more often. Have the old spark plugs and leads so will swap around and see tomorrow. I only got a minute or two from the house and it threw a code P0303 (#3 misfire). Because the snap-throttle readings were identical, I dismissed insufficient valve lash as a cause of the rough-idle complaint. Idle is fine, when warm. with low system voltage that might be causing the misfire as the ignition coils are not getting the usual 13-14. This code signifies misfire problem on cylinder #5. 0L Multiple Cylinder misfire Just a progress report on this thread, the dealer found a cracked head, replaced it and so far so good with no multiple cylinder misfire codes after a good month of running. Rough idle and may stall. Always prove out your diagnostic theory completely, and bear in mind that a malfunctioning EGR system, a faulty fuel injector, or compression problem can mimic ignition component failure and cause the PCM to store a misfire code. After the truck got up to temperature, it gave me another p0300 code and had no power. The fuel pump and module have just been replaced, new spark plugs, gaskets, maf sensor, replaced bad coilpack and i run a fuel system cleaner every 2 weeks. Aug 10, 2019 #21. It'd be pretty unusual. INFINITI G35 💥 NISSAN 350z - Misfire Random P0300 - Ignition Coil and Spark Plugs INSTALL - Duration: 14:49. I don't think I had a plenum job or coil replacement unless it was done with the 120K mile tune-up that cost me $1900 at the dealer, which was about 5 yrs ago. Your mechanic is correct the P0300 code is set when there is a multiple misfire, without knowing the cause, but the P1320 is more specific to the ignition coils. Engine misfire codes are another common reason for check engine lights to come on. I finally got to do some work on it today. I don't have a code reader and I thought the miss was too bad to just be plugs. Can someone share some advise on how to test coils? I've done the following over the last year. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 1. 0 - other international versions of ICD-10 G36. Just 2 weeks ago, the CEL came on, with a cylinder 4 misfire; took it in to my normal shop, no problem found. Don't assume a particular OBD-II code means the same for other auto manufacturers as there are many makes specific codes in use. Checked codes and have 0305 misfire, cylinder #5 and 0205 injector circuit, cylinder #5. Check the INNER EDGE of your tires before the 2019 New Year; Auto Industry - New car sales for October down 4. It can be felt at a stop light idleing, some times the RPM needle will boune around a bit, and you can fell it if you were to lean on the truck. This is the American ICD-10-CM version of G35 - other international versions of ICD-10 G35 may differ. As you know, those p0301 - p0306 codes are misfires for the individual cylinders and the p0300 is a randow misfire code, basically the ECM detects a misfire but cannot determine which cylinder is misfiring. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. P0302 code definition. You can still have a stuck EGR valve, to check it, touch the valve after 5 mins of idling,. with low system voltage that might be causing the misfire as the ignition coils are not getting the usual 13-14 volts. About the only thing you can do is take it to a Cadillac dealer to have it check and make sure it is really a misfire. 0 - other international versions of ICD-10 G36. I didn't replace the timing chain either. Swapped all coils from left to right in order, no change. Its not throwing any codes and. Got other codes too, but they kept coming and going; 0303 was a constant. doesn't change when I move the ignition coils). It only happens at idle and it is not throwing any codes. Lack of power upon acceleration. Ford has issued a service bulletin #11-10-5 to address Ford misfire codes and engine temperature trouble codes on the vehicles listed below. This code signifies misfire problem on cylinder #5. Going to replace the O2 sensor tonight, especially with having 175,000 on it. The problem is to find out which coil (s) is the bad one, most Nissan vehicle owner replaced all six coils at the same time. Don't assume a particular OBD-II code means the same for other auto manufacturers as there are many makes specific codes in use. I don't mean to give you the idea that it's all a hopeless matter! -Because the cool thing is that no matter if you have misfire codes or No Codes at all, the core cause of the misfire is a lack of spark, or fuel or air (think engine mechanical problem such as: vacuum leaks, low compression, etc). The 2011 Ford Escape has 4 problems reported for misfire under load. Has good spark from all the coils. I filled it up with some Mobile premium gas and drove it home, and it still didn't run super well. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. So the next day when I drove the truck to work while driving the check engine light went out. No codes, intermittent rough idle and rare misfire was created by DanB - 2001 Taurus w/ DOHC V6 24v Duratec, 158,000 miles - I just bought it and know a little about the maint. And, it's not just a code since the engine runs bad like a misfire. Also I keep having to add antifreeze but can't see where the leak is going, I checked the oil and it's not milky and there is no oil in the antifreeze as I have checked all of that. Why Does a Car Misfire When in Idle? There are a number of reasons why an engine might misfire while it is idling. 4 Misfire This vehicle came into the shop with a customer complaint of a rough running engine, a misfire. Engine Stalls (Check Engine Light May or May Not Be On). I got an 03 and I did everything on the list and no luck, I'm actually pulling the motor in an hour because the intake valve won't close all the way, 15% leak in cylinder 1 and all the air comes from the intake, only one way for that to hAppen. Codes related to engine misfires. I Let it dry out and everything was fine. im havin the same problem with the misfire at low rpm speeds. But in order for it to work, you must first break the OBD code. Just dont know what it is. CarComplaints. G35 Misfire. Prius, Prius Plug-in, Prius V engine rattle/misfire fix: no longer available? An updated blog about this issue is available here We see a lot of Prii in the shop, and one of the most common complaints we get from 2010+ Prii, Plug-in, and V owners is about the startup engine rattle after a cold soak. What Causes the Code P0300 on a Nissan Quest to Appear? A P0300 diagnostic code on a Nissan Quest is caused by an engine misfire. A misfire will not always set a code. Modern vehicles (vehicles made 1996 on wards) usually are equipped with a computer system called Power train Control Module (PCM), which detects engine troubles, including misfires detection. Including - Timing Chain, Worn Cam, Bent Valves. The misfiring cylinder is causing the "no activity" dtc related to the 02 sensor as when a cylinder misfires,there is alot of oxygen in the exhuast because the fuel did not burn. Also gonna check all the hosesno apparent vacuum leaks, but you never know. Might clean the MAF just to be on the safe side, although their are no codes. The cause is often a problem in the idle air control system. Smell of unburned gas exiting the tail pipe. Code 55 -Completion of fault code display on Check Engine lamp. But something is making them go bad. I also think removing the stock air box is a factor as this leaves the coils more exposed. runs rich, exhaust smells like unburnt gas. But I also don't get the faulty EGR code (0400), which other posts predicted. I have a 2007 CTS 3. and flashing CEL, but no code yet. very hard to define especially when u dont have access to all the gadgets to run the tests. Enter the 5 character trouble codes in the search box and submit the search. If you have a P0300 random misfire code, start by checking the fuel pressure at the rail with the Schrader valve and an inexpensive fuel pressure gauge. Sounds like it wants to start but it doesn't. Car has 92k miles on it and he paid a Subaru dealer to do the 90k service. Cylinder 2 misfire detected. I don't have a code reader and I thought the miss was too bad to just be plugs. A P0302 Infiniti code, for example, would tell you cylinder number two is misfiring. Switch coils and plugs still has misfire on #5 and #6 holes. No codes, intermittent rough idle and rare misfire was created by DanB - 2001 Taurus w/ DOHC V6 24v Duratec, 158,000 miles - I just bought it and know a little about the maint. No codes are being set. P1381 Misfire Detected - No EB (T) CM/PCM Serial Data 2003 ISO Gas Canada Infiniti G35 2003 ISO Gas USA Infiniti. If your "Check Engine Light" is on, it means your vehicle has one or more OBD II Trouble Codes. i swaped the coils like you said and the problem seemed to go away, the code reader still said a problem with o2 sensors but the cylinder 5 misfire code went away and no code came up for a cylinder 3 misfire and the very ruff idleing went away. A P0300 Infiniti diagnostic code indicates a random or multiple misfire. For example, in this animation, the cylinder 1 misfires and the engine runs only on three cylinders. It also smells like gas - I believe it is running too. The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. If the crankshaft sensor is not recognizing that increase of speed, the engine control unit will save a trouble code on that cylinder which the misfire occurred on. Modern vehicles (vehicles made 1996 on wards) usually are equipped with a computer system called Power train Control Module (PCM), which detects engine troubles, including misfires detection. (not the solenoid control). But they keep going bad. It has brought up a code only two times. Most vehicles have either 4 or 6 cylinders. I have a slightly rough idle and its been popping codes every once in a while. 4 Misfire This vehicle came into the shop with a customer complaint of a rough running engine, a misfire. Checked compression, 155 on all cylinders, checked vacuum 19 and steady, performed cylinder balance test and found #4 and #6 which are side by side to make no difference. There are no codes that are directly related to code P0300 - "Random/Multiple Cylinder Misfire Detected". If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. I then replaced the engine left bank of spark plugs, cylinders 5 - 8. At first it was only occasionally but it seems to be happening more often. A misfire will not always set a code. Smell of unburned gas exiting the tail pipe. Failed Emission Test Codes: Most Common Trouble Codes ARP September 14, 2017 Engine Related Issues Leave a comment Based on Illinois Environmental Protection Agency data test, the most common trouble codes that cause an OBD II plug-in emissions test failed on many vehicles and make the Check Engine light on would be fouled or a worn out. That's right! NO CELs, no check engine, and no codes. A P0302 Infiniti code, for example, would tell you cylinder number two is misfiring. Swapped injectors, left to right, no change. Average repair cost is $3,900 at 79,750 miles. This has been happening for over a year and dealership can't find any problem. Code 54-No cam signal at the PCM-No camshaft position sensor signal detected during engine cranking. Possible loose plug lead, fouled plug or similar electrical problem. Wow i just bought the car with 90,000 miles. Cylinder 1 misfire (P0301) on vq35de (self. I did, Bosch Platinums in it, NGK's replaced them. Well mostly on any style ls motor hardly ever is a coil pack bad p0300 misfire code crank ur truck up and pull that plug wire off while it's running make sure u use a good pair of insulated player if it's sparkin when I hold the plug wire close to it then put spark plugs in it and if by any chance plz don't trust pre gapped plugs double. The plugs had no electrode left and at least half of the plugs were loose enough to unscrew by hand!!!. 6 small V-8 with coil on plug ignition. They looked okay, not old, not new. history, the original owner tried his best to pass on information. No MIL-on condition had been noted before the cranking, no-start complaint. Now it is doing it a lot worse, but the misfire with no codes - Toyota 4Runner Forum - Largest 4Runner Forum. Any other sug 4 Answers. Look up B, C, U and P codes to diagnose your car problem. How to check fuel injector pulse using a noid light This is a awesome test because it can be done very fast using a very inexpensive tool called a Noid light. After driving about 200 miles, including long trips, I no longer get the misfire codes, and I don't detect any misfire. Most vehicles have either 4 or 6 cylinders. with the interior lights dimming at idle i would say you need a new alternator, probably have a bad diode in the rectifier in it and it is not producing enough power at low idle. The P0301 code means that the cylinder 1 is misfiring or is randomly misfiring. 5 times the legal limit. P0306 Misfire Code. The engine usually feels rough, lacks power and uses more gas than usual. All left me shaking my head. I lost sight of her so I pulled over. No codes or CEL light. I have plugged it into my cheap obd2 scan tool theres no codes that come up. I am pretty much just getting P0300 codes now, no cylinder specific misfire codes. P0300 2004 INFINITI G35 - Cylinder Misfire Detected Random Cylinders is the common definition for the P0300 2004 INFINITI G35 OBDII Code. One of the six coil packs produced no change in engine behavior when it was disconnected. Test drive, still misfiring with same codes. I erased the code and on my way home from work that day it came back on. INFINITI G35 💥 NISSAN 350z - Misfire Random P0300 - Ignition Coil and Spark Plugs INSTALL - Duration: 14:49. But I also don't get the faulty EGR code (0400), which other posts predicted. I've been experiencing some random misfire lately on my '02 5. At first it was only occasionally but it seems to be happening more often. 1 on page 16). Just 2 weeks ago, the CEL came on, with a cylinder 4 misfire; took it in to my normal shop, no problem found. A shorted or open fuel injector solenoid, or a shorted or open coil, will usually set a code, but a dirty or weak fuel injector or a weak coil probably will not set a code. Why Does a Car Misfire When in Idle? There are a number of reasons why an engine might misfire while it is idling. This code signifies misfire problem on cylinder #5. I have had it scanned now 6 times and have no codes tha. I have a slightly rough idle and its been popping codes every once in a while. Any mis-fire in the cylinder will create a lean condition on the O2 sensor, rather the cause was lack of spark or plugged up injector. New to the forumI have a 97 Subaru Legacy 2. Codes related to engine misfires. 2002-2003 blackwood. Any other sug 4 Answers. PLEASE HELP: 4. Rough idle and may stall. You can get a code reader that works with 1996 and up vehicles for about $15 here: P0302 Cylinder 2 Misfire - 04 Infiniti G35 (self. This is a puzzler. I have owned the vehicle since February. Normal misfires may be unnoticed, but a long sticking engine misfire is difficult to miss. Rough idle and misfiring, but no codes. P0300 Diagnostic Code. The spark plug uses an electric spark to ignite the flammable air/fuel mixture, producing energy. The Engine Control Module (ECM) detects a misfire by using the crankshaft position (CKP) sensor to measure the acceleration of the crankshaft when a cylinder fires. Replaced spark plugs, no rough idle, had my ECM sw reflashed but I still get the code every month or so. But something is making them go bad. P0303 Code - Cylinder #3 Misfire Technical Description Cylinder #3 Misfire Detected What does that mean? A P0303 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. Additional OBDII codes that are present along with misfire codes can shed some light on the cause. I'm somewhat capable of performing most routine maintenance, but chasing misfires isn't my something I do everyday. 0L Rubicon engine would not idle on a hot restart. On a 97 420a eclipse, the engine will misfire and misfires. 6L with 104K miles. After the truck got up to temperature, it gave me another p0300 code and had no power. A unique code shows a misfire on one cylinder, such as P0307. But in order for it to work, you must first break the OBD code. At 127,000 miles, I'd start with plugs and go from there. Crankshaft Position Sensor A Circuit Malfunction. Feels like a dead miss. Swapped all coils from left to right in order, no change. Rough idle and misfiring, but no codes. 2004 Infiniti G35 Sport Coupe. So, An engine misfire is the name for what happens when; a engine skips over one of the processes of its combustion cycle. A spark plug is located on the top of each cylinder. Diagnosing an Engine Misfire Download PDF. 1L when at 600 rpm idle still gets near 14 volts on the guage, my scanner, and voltmeter in the accessory plug. CarComplaints. With this getting worse it is also setting off MIL illuminated with a stored code of P0300. But it being wrong would cause a misfire, high idle then low idle right? Pretty much. If you also find a P0204 code (P0200 series codes cover the injectors), you'd know the misfire was probably caused by a bad injector. Right but instead its backwards. P0303 Code - Cylinder #3 Misfire Technical Description Cylinder #3 Misfire Detected What does that mean? A P0303 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. 0 - other international versions of ICD-10 G36. Bad gas mileage. How much does a cylinder misfire repair cost?. It only happens at idle and it is not throwing any codes. However, by the time you got only 10psi of compression due to a HG failure, you'd be dumping white smoke and losing a lot of coolant, usual BHG problems. Fault codes indicated misfire. im havin the same problem with the misfire at low rpm speeds. Just 2 weeks ago, the CEL came on, with a cylinder 4 misfire; took it in to my normal shop, no problem found. Hope it is just water causing ur issues. If the problem persist more tests needs to be done to diagnose problem, see “Possible Causes”. As a sidelight, I also should have remembered that aluminum cylinder heads tend to ­increase valve lash as they warm up,. So it was not a clean misfire, other things went wrong at the same time. onboard diagnostics demystified Since the mid-1990, no vehicle innovation has done more for vehicle service and repair than on-board diagnostic (OBD) systems. Mode $06 misfire information displayed. Got other codes too, but they kept coming and going; 0303 was a constant. Post got moved so Ill rewrite it. On a 97 420a eclipse, the engine will misfire and misfires. When driving it you could tell it has a misfire b cause you feel it vibrating but there is no check engine light and no codes. Average failure mileage is 61,300 miles. Misfire is present, but no misfire codes are registered in the computer's memory and/or no check engine light (CEL) on. If you have a 03-07, you will need to use a scan tool to check this pressure. 4 Misfire This vehicle came into the shop with a customer complaint of a rough running engine, a misfire. No spark plug wires, code reader is always reporting cylinder #2 misfire and I have swapped plugs and coils on cylinder #2 just to eliminate it. Motordyne G35 9,820 views. 6L with 104K miles. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 3. Diagnosing an Engine Misfire Download PDF. take a look at this o2 reading at idle tell me what you think please pic. P0303 Code - Cylinder #3 Misfire Technical Description Cylinder #3 Misfire Detected What does that mean? A P0303 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. What the P0302 code means. Failed Emission Test Codes: Most Common Trouble Codes ARP September 14, 2017 Engine Related Issues Leave a comment Based on Illinois Environmental Protection Agency data test, the most common trouble codes that cause an OBD II plug-in emissions test failed on many vehicles and make the Check Engine light on would be fouled or a worn out. But they keep going bad. This is a puzzler. I have a 2007 CTS 3. Checked codes and have 0305 misfire, cylinder #5 and 0205 injector circuit, cylinder #5. When it misfires, the car shakes, the first time it happened I thought someone tapped my car. The fuel pump and module have just been replaced, new spark plugs, gaskets, maf sensor, replaced bad coilpack and i run a fuel system cleaner every 2 weeks. 4 Misfire This vehicle came into the shop with a customer complaint of a rough running engine, a misfire. Feels like a dead miss. P0306 code definition Cylinder 6 Misfire Detected What the P0306 code means P0306 is an OBD-II generic code that the engine control module (ECM) detected a misfire on cylinder number 6 of the engine. 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 2006 Infiniti G35 Missing On Occasion, Especially Around 6 To 7pm My Car Will Begin To Miss For No Apparent Reason. 7 Vortec Code P0300 Random Misfire Feb 03 2013, 8:07pm ive got a 1999 chevy k1500. it is actually misfiring (you an feel it). Rough idle and misfiring, but no codes. So, An engine misfire is the name for what happens when; a engine skips over one of the processes of its combustion cycle. Test drive, still misfiring with same codes. G35 Misfire. Took it to Honda and they didn't know what the problem was but they wanted to start trying different things. On a 97 420a eclipse, the engine will misfire and misfires. No fault codes stored, no untoward readings as I started it up, it revs cleanly all the way to the red line, the pedal site and throttle site readings all change smoothly, the injectors are all pulsing away correctly, the lambda is in the correct range, there is absolutely no sign that anything was ever wrong with it. The 2019 edition of ICD-10-CM G36. Cly balance test #5 and #6 low performance. So far I've replaced all the plugs, plug wires, new fuel filter, and new coil pack and injector in the number 4 cylinder. That is what sets a no activity code as the 02 sensor will read a lean condition due to the misfire. i swaped the coils like you said and the problem seemed to go away, the code reader still said a problem with o2 sensors but the cylinder 5 misfire code went away and no code came up for a cylinder 3 misfire and the very ruff idleing went away. What the P0302 code means. 5GT that has had all plugs, wires and the coil pack replaced in January. If there is not a Cylinder Misfire Counter, then you might have to switch components—such as coils, spark plugs, etc. I have no power and the car convulses and jumps arround when its not in vdc. It idles very rough at all times and when you put it in gear it stalls the engine light flashes on and off then stays on, I changed the spark plugs and I tested all the coils, I even tried new cam shaft sensor still the same thing. Knowing the type of misfire eliminates many possible causes.