[Robmaster]

hey guys
i have problem with misfiring in cylinder 6 when i go WOT in higer rpm's.

Code:

29D2 misfiring cylinder 6 @ 4702rpm

could it be a spark plug problem??? i never change them (car has 31000miles).

mods:

JB4 map2
AA DP's
ETS FMIC
BMW PE
BMC drop in filter

thanks for help!

[Elie335]

can be, or the injector is gone.

[TurboBimmer]

I would change the spark plugs and the coils, which can easily be swapped at the same time.

[SkySoldier]

Could be HPFP, this was the first issue I had with my last one going out.

[Bash]

Plugs first, coil then injector. Step by step until resolved.

[XS222]

Originally Posted by Bash

Plugs first, coil then injector. Step by step until resolved.

exactly.

i had the same issue and decided to change plugs. no more misfire

[Mike@N54Tuning.com]

Change plugs for sure, and if problem continues move on to the next likely candidates as mentioned above.

Mike

[TwinTurboXI]

I had a misfire in cylinder 2 at WOT.

Here's how a buddy of mine helped me diagnose it...

We checked the spark plug to see how bad it looked, instead of just buying new plugs, we swapped the coilpack to another cylinder.

Sure enough, the misfire moved to the other cylinder so it turned out to be a bad coilpack.

A trip to the dealer and $62 later, my car is running amazing again.

[bahn stormer]

Originally Posted by XS222

exactly.

i had the same issue and decided to change plugs. no more misfire

+1

[tomtom11]

im confused in terms of if this is an injector issue, what i mean by this is, lets say its not the spark plugs, if it was the injectors is that because they were defective ones from before the recall or are they the newest ones and they still are going bad? because at the dealer a few weeks ago my injectors were replaced under a recall so i was wondering if the misfires are from the old faulty injectors or because the new ones are still going bad?

[Jeff@TopGearSolutions]

Originally Posted by TwinTurboXI

I had a misfire in cylinder 2 at WOT.

Here's how a buddy of mine helped me diagnose it...

We checked the spark plug to see how bad it looked, instead of just buying new plugs, we swapped the coilpack to another cylinder.

Sure enough, the misfire moved to the other cylinder so it turned out to be a bad coilpack.

A trip to the dealer and $62 later, my car is running amazing again.

+1

But new plugs couldnt hurt at 31K

[Fernflex]

Injector dead, just replace mine!

[David1]

It can be everything mentioned above and also carboned up intake valves depending on how many miles are on the car.

[Bakeme521]

I'd change the plugs first. Then look into coils then injectors.

[Robmaster]

thanks guys!

i change the plugs now, hope that solve the problem. i also would swap the coilpack to an other cylinder.

but i really hope it isnt the injector!!! that thing is damn expensive! (warrenty is over...)

[Sparky66]

Spark plugs and coilpacks can be swapped to other cylinder banks but injectors can't, since they are specifically coded and programmed to operate on the designated cylinder.

[Robmaster]

Originally Posted by Sparky66

Spark plugs and coilpacks can be swapped to other cylinder banks but injectors can't, since they are specifically coded and programmed to operate on the designated cylinder.

thank you for the info. but i still hope it's not the injector

[jlcolon2001]

Did you solve the issue? My car is doing exactly the same, misfiring in cylinder #6 @ WOT.

[woptang22]

Originally Posted by Robmaster

hey guys
i have problem with misfiring in cylinder 6 when i go WOT in higer rpm's.

Code:

29D2 misfiring cylinder 6 @ 4702rpm

could it be a spark plug problem??? i never change them (car has 31000miles).

mods:

JB4 map2
AA DP's
ETS FMIC
BMW PE
BMC drop in filter

thanks for help!

I just had the same exact problem a few weeks back. Misfire in cylinder 6. I took it in to Helix Motorsports in philly and there was a bad coil pack and I had all 6 plugs replaced. Problem solved. I think theres a video on cobbs website showing how to diagnos and fix a misfire like that. Take the coil from cyl 6 and put it in cyl 5 and put coil 5 in where 6 was. If the misfire follows the coil, then the coil is bad. If not do the same with the plugs. Im no tech just watched the video. Check it out on youtube or cobbs website. Good luck with the fix. Im sure its probably something similar to what I had.