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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 > Help trouble shoot misfire



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      12-28-2012, 07:24 PM   #1
Bimmer305
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Help trouble shoot misfire

Hi,

I'm back using E85 after re-installing downpipes and intercooler due to dealer replaced my DME.

I will be trouble shooting it tomorrow (swapping coils, spark plugs,...). But in the mid-time can anyone take a look at this short log for anything out of the ordinary?

Background;

Dealer replaced DME, 6 coils and 6 injectors. And I replaced all 6 spark plugs. Car had no misfire before using E85 (only 2 gal to half a gas tank).

Misfire is on cylinder 3

Thanks.
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Last edited by Bimmer305; 12-29-2012 at 02:42 PM.
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      12-29-2012, 02:41 PM   #2
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After trouble shooting it comes up to two options;

- BMW Dealer didn't properly coded injector #3
- or the brand new injector is bad?

swapped coils, then spark plugs, but misfire stays on cylinder #3.

I just purchased the INPA usb cable to see if it is coded or not. But it does not get here until next week.

Is is possible that a brand new injector is bad?
I'm inclining more to think that the dealer did't coded it.
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