[jturner]

Hey, I'm having an issue with my m5. Constant but very slight misfire at all rpm's - but the car still pulls incredibly hard. I've unplugged each coil individually and found cyl 4 on bank 1 makes no difference. Swapped with a known good coil from another car and still misfiring. Plugs are only 6000km or so old. exhaust has quite a "fuely" smell to it. Got an injector on order, but could anyone confirm if they've had this before and what the culprit was?

There are no codes. I've also tried the ISTA individual fuel injector shut off and cyl 4 doesn't do anything when turned off, so im 100% sure there's an issue regarding that cylinder. Im just not sure what…

[beamerguy707]

Listen for the timing chain upon a cold start, if it sounds raspy and weird, you could have a timing chain going out