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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 > Cobb misfire ?????



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      06-13-2012, 11:44 PM   #1
Ub2slow335i
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Cobb misfire ?????

I have a 08 335i that's still under factor maintenance and warranty as well as the extended warranty,the car has 38k. But anyways with the Cobb the car gets misfires and throws check engine soon codes,which is most likely from the plugs or bad coils. It does not do it with the car on a normal tune. Is there a way to have the Car do the misfire and remove the Cobb but keep the codes so BMW sees them??? I brought it to them with the tune removed and they say there's no issue
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      06-13-2012, 11:49 PM   #2
rader1
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When you uninstall the Cobb AP it deletes all the codes. If you're getting misfires across multiple cylinders its almost certainly the plugs. Buy some plugs and DIY.
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      06-14-2012, 01:36 AM   #3
enrita
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Just get new plugs..
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      06-14-2012, 03:19 AM   #4
cstavaru
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Quote:
Originally Posted by Ub2slow335i View Post
It does not do it with the car on a normal tune.
What is a "normal tune" ?
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      06-14-2012, 05:48 AM   #5
BMJ
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Quote:
Originally Posted by cstavaru View Post
What is a "normal tune" ?
hahaha I want one of those!
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      06-14-2012, 09:30 AM   #6
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Gotta replace your plugs, my car was misfiring on Stage 2+ and on Stage 0/Stock it was completely fine. If you don't want to pay out of pocket for the replacement plugs, challenge the Service Dept & ask when was the last time they changed them. Kiss the SA's ass & you'll be fine.
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      06-14-2012, 11:00 AM   #7
Ub2slow335i
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Quote:
Originally Posted by cstavaru
Quote:
Originally Posted by Ub2slow335i View Post
It does not do it with the car on a normal tune.
What is a "normal tune" ?
Stock.
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      06-14-2012, 11:02 AM   #8
Ub2slow335i
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Quote:
Originally Posted by benzy89
Gotta replace your plugs, my car was misfiring on Stage 2+ and on Stage 0/Stock it was completely fine. If you don't want to pay out of pocket for the replacement plugs, challenge the Service Dept & ask when was the last time they changed them. Kiss the SA's ass & you'll be fine.
I'm going to def try it.
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      06-14-2012, 11:32 AM   #9
Jeff@TopGearSolutions
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      06-14-2012, 02:33 PM   #10
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Pretty easy to do yourself too

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