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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Misfire issues during track day

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      05-14-2020, 02:11 PM   #23
GerardzM
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Make sure your plugs are gapped correctly.

It is possible to blow out the flame front with extra air being forced in there(tuned).

Dealers certainly don't. Last service the damn thing was misfiring coming home from a service visit. Got home...all the plugs were grossly out of spec....each cylinder plug had a different gap!
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      05-16-2020, 08:31 AM   #24
squixs
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Quote:
Originally Posted by GerardzM View Post
Make sure your plugs are gapped correctly.

It is possible to blow out the flame front with extra air being forced in there(tuned).

Dealers certainly don't. Last service the damn thing was misfiring coming home from a service visit. Got home...all the plugs were grossly out of spec....each cylinder plug had a different gap!
What is the correct spec for the OEM Bosch plugs?
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