Passat (B6) :: Engine Running Rough And CEL On - Misfire On Cylinder 2 And 4
Feb 16, 2012
I'm having an issue with a 2008 Passat 2.0T. Engine ran rough one day and check engine light came on! I get the VagCom out, scan the ECU and get misfire on cylinder #2 and #4. Car has 109 000km. Plugs were never changed so I order some new OE Bosch platinum iridium plugs. Go for test drive after having change the plugs and I still get misfire on both cylinder number 2 and 4.
I know coil on plug are prone to be weak on those engines so I go ahead and order 4 new coils which are pretty low cost which is good. Once install on the car I go again on a test drive. car ran really smooth and no check engine light came on. I said fine! I fixed the problem only to discover the day after that the CEL decide to come back on I scan again and this time only get misfire on cyl #2 with fault frequency of 39.
I suspect my injector to be bad but before I decide to remove the intake manifold and spend another 2-300$ in parts. Any way to test my injector with VagCom in order to see if that really is my problem. Also heard the PCV could be a problem but i hardly doubt it would throw a fauly code on just one cylinder.
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My 04 1.8t is running rough with the cel on. i scanned it and cyl 1is misfiring. tried changing plugs. seemed to work while idling but as soon as i accelerated it started running rough again.
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Okay so last year i bought a 2000 celica gt manual with 50,000 miles, and currently has 67,000 miles. A few days ago I started to notice the engine was running rough and then about 10 miles later the chack engine light came on. I promptly went to the auto parts store to read the code. I was informed I have a cylinder 1 misfire. Naturally i replaced the spark plugs with NGK iridium, reset and rechecked engine code. Same code. Next i swapped the coils from 1 and 2, reset and rechecked. same code. I then swapped fuel injectors from 1 and 3, rest and rechecked. Same code. So now i am a bit stumped.
Only faulty equipment prior to this incident would be 2nd gear synchronizer. Only applicable above 5,800 RPM.
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I have a 2003 ranger and have had ongoing problems with misfire cylinder six and have had three different mechanics diagnose the problem as a bad ground. I have replaced all plugs, wires, coil pack, injectors and am constantly pulling the plug on cylinder six, cleaning and often replacing, I also disconnect the battery so it resets the check engine light and it runs fine for about 100 miles and starts running rough again and on goes the check engine light. I have 134000 miles and have maintained it since new.....
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When I'm driving and get above 50-60 I will get the Check Engine Light. Check the codes It shows 6 ---300, 303, 306, 300, 303, 306. When I slow the car down it is running rough, almost like it has a miss.
I reset the computer while this is going on and the engine smooths out and it runs correctly until I keep my pedal down and then it kicks the exact same errors.
Here's strange part number one: Once I get down to about a gallon or two of gas in the car everything seems to run fine. I have plenty of power, no codes and the car runs fantastic!
Strange part number 2: Very occasionally When I get in the car in the morning to go to work, the car is a bit difficult to start. When it finally kicks over, it is immediately running rough. resetting the computer with the engine running does not seem to stop the rough running. If I turn off the engine and let the car set for a bit it will start and run fine, with the exception of the first problem mentioned in this thread. There is no code while it is running rough, but when the Light kicks on as per the first issue mentioned, I have an additional code -- 335. This car has been excellent up until the last few months when this issue developed.
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My 1996 S10 2.2 liter pickup has been having some 'issues'. Truck has been kind to me over the years, but now is running a bit rough. It has an irreguler idle and continues to run this way through all speeds. The blinking code reads "cylinder 1 misfire". I did all the basics. I changed the plugs and wires, ignition coils and fuel filter. Here is where is gets tricky, after changing the fuel filter, it ran great again. Then it started to run rough again later that day. I thought I somehow clogged up the new filter, so I removed the new one for inspection. Realizing there was nothing wrong with it, I reinstalled. Truck ran great again. Went out to drive it to work a couple hours later and it started fine, then after about 10 seconds of running, it went back to the rough idle.
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So I have been unable to figure this problem out and so had my mechanic, I am starting to think this car is cursed. I have an 07 outback with about 54000 miles on it, a few weeks ago it through a P0303 for a misfire in the third cylinder, thought nothing of it, light went off in the next couple starts and the car was running great. Had this happen a couple more times but only after the car had been out in the rain. Each time the problem went away. Now the car has sat in my garage for four days, I got out to start it and get an extremely long crank but no turn over. Try again and after 5-6 seconds car turns over but is running really rough and stalls out. Disconnected the battery checked hoses, everything looked normal, reconnected the battery and now the car is running fine.
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My wife's car suddenly started running rough. 2005 Taurus, 6 cyl, 3L, OHV, 83K miles. CEL came on and code came back as "P305 - cylinder 5 misfire detected". As a side comment, her tachometer has been fluctuating big of late as well.
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126000kms on 03 explorer 4.6 truck started. Running rough at idle and under load.... Code came up for cyl 8 injector. Replaced injector... problem still there. Switched cop and plug with another cyl and plug.... same code and cycl 8 is definitely not working. Would a generic problem always affect i cylinder. I even checked wire clip on for injector... it appears ok. There is power to injector wire clip.
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2000 4.2....Last year I had to replace the coil pack when it started running rough and had a code for a misfire on cylinder 3. It is doing the exact same thing now, same code, same cylinder. Is there something wrong that is causing this?
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So every once in a while I would start my car and get a rough idle but not too bad. I got a cel after a few times of this happening. I had a misfire on 1 and 4 and possible misfire on 2. It was ok for a a couple days. But during the last few days I'll start it up and it's fine. But then if I shut it off and restart it will have a rough idle again. Also today I got gas and then it rough idled and when I would shift or put it in neutral the rpm would stay up and drop slowly down. Like if I shifted gears I could almost do it without the rpms dropping at all. I've got 110k. ??
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I started the car the other day and it was running really rough and engine light was on. I started pulling the spark plug wires and pulling #3 didn't make any difference in terms of decreasing performance where the others all did.
I've replaced the plug, and distributor cap. I've also confirmed with the plug out of the block that it is firing.
I'm not sure at this point what to look at next. This happened overnight, not gradually over time, and apart from running rough the engine isn't making any noises which based on sound, and how fast it happened doesn't make me think its a scoring/compression issue.
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I have a 1990 3.1L, multiport fuel injection (NOT sequential FI), which runs very well most of the time. However, when I cold start it runs rough (misfire) for about 1 minute (no throttle) or until acclerated. The is no misfire when running normal, but it might be running a little rough when stopped at a traffic light (in Drive, foot on brake).
I put new plugs and wires on, but it did not affect this problem.
I am not using coolant, or oil, the plugs that were removed were somewhat worn, enough that I expected to notice a difference after they were changed.
I have not yet (1) cleaned the MAF, (2) checked carefully for vacuum leaks, (3) checked for leaking injectors.
Since this is a 1990, OBDI, I can't say which cylinder is misfiring or how the fuel trims look etc.
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I got 2006 vw passat 2.0, two weeks ago i replaced ignition coil pack on cylinder 3, and last Friday i replaced for second time same coil pack on cylinder 3, and today i got check engine, and it gives me a misfire on cylinder 3, it always giving me misfire on cylinder 3, the coil packs are all 4 new, i bought from a dealership, the other three coil packs does not give me a check engine, when i start the car, i feel little shaking, so what else i can do to fix this problem.
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My check engine light came on in my 06 toyota avalon. i had the code read at pepboys and they said it was something like 0300 misfire. i took it a few days later to my personal mechanic and he said nothing popped up when he tested the code. i notice the car (engine) is running a little rough though. What is the firing pattern as i want to try and fix by putting new plugs and coils.
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98 5.0 last week i was driving around for a few hours and everything was fine. Did some work in the garage for a few hours and had to run to the hardware store. Started the truck up and she ran like crap. Engine shaking like a misfire. First thought plugs and wires. Well by then it was late and Easter was the next day didn't get to it till Monday. Well after the change still crappy running.
So I changed the fuel filter and cleaned the mass air. No change. Checked for spark on the coil packs all have spark. Checked the PCV all good there. Checked for vac leaks none found. During that I noticed a small hole in the EGR tube I repaired that but still running like crap backfiring out the exhaust, engine shaking badly at times. I also changed out the FPR on the fuel rail. No change of course.
As of today I changed the coil packs. Again no change. Only code it throws is a EGR high flow after I fixed the hole but was having problems before that.
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I'll try to break this down as best I can. I went to my mechanic this am with a check engine light. My suspicion is 02 sensors. This was confirmed as a problem area, but separate they said I had a spuratic misfire in cylinder 4. With that info, i pulled the plug to inspect (I had just installed new ngks in it and they have 18,000K on em.
I put beldon wires on about 8k ago.) plug looked to be normal, but there was definitely a puddle of oil from the valve cover leaking. Oil went into the cylinder head but I didn't really think that was an issue. Nothing abnormal jumped out at me so I reinstalled plug and checked all wire connections at both ends and called it a day.
Then I drove it. Check engine light flashing. Major performance stutters, etc. I drove it for about 20 miles and hoped it was just the oil raising hell in there and it would burn off eventually. It hasn't gone away yet. Maybe coil pack. Can the single portions of that pack be replaced, all i see them sell is the full three as a unit.
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Got the flashing check engine light and loss of power for few seconds and then the light stayed still, from time to time it blinks for few secs, usually when I push the gas pedal little bit more but it stays still, flashed only twice in 2 days for seconds. I connected computer (not VAG) and it says "Cylinder 4 misfire". I have app scheduled with my mechanic this Thursday, but still need to commute to work. Is it safe to drive?
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In the last month, my car has had an awful time starting on 2 different occasions. The first time it ran really rough for about 1 minute then was ok. The second time was the same but the engine light came on. Took it to an out of town dealer and he said it showed a misfire code but could never find anything else and all looked OK. Spark plugs?
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I have a 2001 elantra 2.0 gls. It is running rough with low power and flashing engine light. It may have a bad 02 sensor but when checked for spark only the 2 and 3 cylinders were sparking. I can confirm this because when I unplugged the 1 and 4 spark plugs it made no difference in the way it was running. Next I tested the resistance on the coil packs. Both were an even 1.5 ohms. How can it be that the coil packs are good yet the plugs aren't firing? I also have moved plug wires around and have had no success.
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Just started getting a p0300 random misfire code on the durango a couple days ago. pretty sure it isn't moisture related since it started on a nice sunny day. it was running pretty rough so it was obvious that it was misfiring. I changed the plugs since it was about time anyway, and they needed it and I cleared the codes. new plugs (put in the oem champion copper plugs) didn't make the problem go away. The engine still ran rough and the code came back. 2 of the plugs looked like they may have been fouling a little bit. they were a fair bit blacker than the rest of the plugs. I went ahead and changed the coils on those two cylinders and reset the codes again. Still runs rough and the p0300 came back. where do I go from here? I am not getting any specific cylinder codes so it makes sense to me that it isn't one or two cylinders not getting spark. 2003 durango 4.7 ....
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