My latest m3 is a 99 vert with Dinan supercharger. In the past i've gotten cylinder misfires and o2 codes but when cleared it went away. Last couple days i have been getting cylinder 1 and 2 misfire codes. I can obviously feel the misfire but it comes and goes even while going thru powerband. For example runs good then starts to helicopter for some rpm then goes back to fine. This just started happening in last few miles and car was sitting for a week or two. So far cel keeps coming back after being cleared. Any suggestions what to check?
Random CEL for cylinder misfires- 99 M3 SC
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