Engine warning light and low power - help

E3 PSB

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Typically, after picking her up yesterday from having a lovely front end respray she was suddenly down on power (as if not firing on all cylinders) also the engine management light is now on, had the head gasket done 5000 miles ago, 79k FMDSH, any ideas? 2004 e46 M3 SMG vert.

Thanks in advance.
 

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I’m having a similar issue. Have you read the codes? I’ve noticed my fuel injector wiring harness clips are broken
 

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I’m having a similar issue. Have you read the codes? I’ve noticed my fuel injector wiring harness clips are broken

Hopefully gonna get the codes read tomorrow, will update on here, I’m wondering if anything was accidentally knocked when the bonnet was removed to paint, as in the wiring harness clips?
 

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I also had the MAF code up first (now cylinder 6) so gave it a clean spraying with contact cleaner. Might be worth a go
 

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I also had the MAF code up first (now cylinder 6) so gave it a clean spraying with contact cleaner. Might be worth a go

Argh yes I’ve read that could be a potential fix, trouble is, if you asked me where the engine is in my car I could state with confidence that it’s located at the front, my mechanical knowledge stops there unfortunately.
 

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Update: turns out that I’ve a misfire on cylinder 6. So hopefully just a spark plug, a HT lead, or worse case scenario, an injector (apparently) I hope…..
 

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Same code that I’ve got. Let me know how you get on please
 

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Very likely coilpack. If there's no history of them being ever replaced I'd recommend swapping all of them out as once one goes, the others start to follow.
 

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Very likely coilpack. If there's no history of them being ever replaced I'd recommend swapping all of them out as once one goes, the others start to follow.

D’oh, good call, ok. Approx how much are they per pack? Thank you
 

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D’oh, good call, ok. Approx how much are they per pack? Thank you

Per coil pack its around £20 for Bosch ones. Before you order just confirm it is the coilpack by swapping out the one on cylinder 6 with the adjacent cylinder and see if the fault codes move. That will rule out a spark plug.
 

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Per coil pack its around £20 for Bosch ones. Before you order just confirm it is the coilpack by swapping out the one on cylinder 6 with the adjacent cylinder and see if the fault codes move. That will rule out a spark plug.

Brilliant! That’s great advice, I will be doing this on Friday.

Really appreciate your input, thank you.

Would have replied sooner but just spent two hours reading your build thread lol made a fantastic job of your coupe, looks superb.
 

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Brilliant! That’s great advice, I will be doing this on Friday.

Really appreciate your input, thank you.

Would have replied sooner but just spent two hours reading your build thread lol made a fantastic job of your coupe, looks superb.

No worries and thank you.

Keep us posted :thumbsup:
 

monkeyboy

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Euro car parts Bosch ones are £20 each at the moment I paid about £36 each when I replaced mine but waited till they had a deal so essentially got buy 1 get one free so try them
 

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