Quote:
Originally Posted by cosmi149
Hi, did you find any fix for it? I have the same issue on cylinder 4.
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I had a misfire of cyl 4 after i had fitted new plugs last week.
It was nothing more than me not refitting the coil pack plug on properly.
When I bought the car last month, (116i 2014) the tailipipe looked like a last century diesel's.
It was the maf sensor causing overfuelling. It was 8years old and had done 85000 miles.
Superchips comment that the AFR is closed loop is only partly true. It is open loop during warm up, and when using large throttle openings so overfuelling, very sooty exhaust and plugs does happen.