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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > What does it mean\"misfire on cylinder 6\"?



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      12-08-2011, 03:11 PM   #1
TxBeem
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What does it mean\"misfire on cylinder 6\"?

I recently got a JB4 and on map 2 I noticed that in moderate acceleration I got a vibration/slight stutter b/w 2k-3k RPM, then it\'s gone.
Found out I have several codes but the big ones would be 29D2- misfire on cylinder 6. Is this a injector problem?
Also got I believe 2AAF -fuel pump plausibility. What does this mean?
If I go back to Map 0, there is no vibration at 2k-3k rpm (I have Dinan stage 2)
Can you guys direct me to what I should fix?
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      12-08-2011, 03:12 PM   #2
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it means you probably need new spark plugs
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      12-08-2011, 03:44 PM   #3
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Either cylinder 6 needs either spark plug, injector or coil. It's one of them. First do the spark plug then if it still happens troubleshoot the next item and so forth
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      12-08-2011, 03:46 PM   #4
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Swap Coil #6 with another cylinder's coil and see if the problem transfers to a different cylinder. If it does, you need a new coil. This would be the first thing I would do.
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      12-08-2011, 03:50 PM   #5
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he has a 2008 335i- my first thought would be "is the car on the original spark plugs?"

if so, it's well-overdue for new plugs
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      12-08-2011, 09:04 PM   #6
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Thanks guys! I'll start with the plugs. I don't think it has ever been changed.
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      12-08-2011, 10:22 PM   #7
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Mine had this same problem, sometimes others would misfire as well. They found injector 6 "leaking" causing fuel pressures to drop. They replaced 3-6 injectors because 1-2 were already replaced during the recall not too long ago. Now all 6 of mine are the NEW part number; apparently they have upgraded the injectors at some point because the originals caused misfires. Car idles MUCH smoother now. I only have 35k miles on my 2008 but I will be replacing the spark plugs next week because I feel like they probably need it by now (with all of the fuel and misfire problems in the past).

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