M-Series (M1, M3, M5, M6)General M-Series Discussion - If it does not fit into a more specific M Category above, please place it in here. In addition, previously archived M-Series discussion is located in this section.
Hi there, i am having a issue with my 2004 M3... it was running very well and one day i went to start it and it had nuthing. It started fine but was running very rough. Small back fires and when i went to drive it it just sputtered and didnt want to drive. It has just over 100k and has been only worked on by BMW and its up to date on all services. It also has a check engine light on now. Starts fine just runs rough. Have not tried to take it out of garage. I am thinkin sensor or something like that. Converter perhaps. Any ideas?
Sounds loudly like - first, ignition coil/coils (the Bremi brand coils thy came stock from the factory are now being replaced when they wear out with BOSCH coils at the dealerships - FYI). If you do have a bad coil situation, much better to have all of them changed while the work is being done. Second possibility is the MAF which may have caused your car to go into "sluggish/sleep mode". Having said this, I just had this happen on my E46 M3 which, while air flow on mine is very different, the root issue is the same. I'd all but bet you have a bad coil. Let us know. Good luck!!!
2008 ///M5 with Eisenmann race exhaust "Athena" 2011 X5 - Loaded - N55 twin scroll turbo 300hp RIP 2005 Dinan ///M3 S3-R+ Vert w/hardtop- 6-speed, DINAN SC - race kit, race headers, etc. RIP 2002 Z3 Roadster 2.5i - VF Supercharged, 5-speed, Brembos etc. Turkey ///M Car Fleet Commander
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