BM3 tuned here as well and having the same spark plug issue. I cleared the codes but had a misfire on cylinder 5 and a few other codes. Last time I brought it to the dealer my SA asked if I had plugged anything into the OBDII port. I wasn't aware that they could see that so I just said I had been playing around with some coding. If it's an easy fix, I was thinking of just changing them myself. Anyone have a part# and the recommended gap?
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