United Bimmer Community - BMW Forum - View Single Post - One black spark plug

**David Mc** · 05-13-2010, 07:00 AM

I would be doing the gasket repair first. If the spark plug well fills with oil. it can short out the ignition to that plug as carbon-laden oil is conductive. The coils can be swapped without any problem as they are all identical in the event that a gasket repair doesn't cure the problem but I think an injector fault is unlikely.

05-13-2010, 07:00 AM	#2
David Mc Name: David Mc Title: Member Status: Offline Join Date: Nov 2007 Location: Queensland, Australia User not setup in Rate My Car. Click here to set it up. Your Ride: 1998 e36 328i	I would be doing the gasket repair first. If the spark plug well fills with oil. it can short out the ignition to that plug as carbon-laden oil is conductive. The coils can be swapped without any problem as they are all identical in the event that a gasket repair doesn't cure the problem but I think an injector fault is unlikely.