Ms are cold natured beasts, Our M3 sends CELS all
time. Usually misfires when the weather starts getting cool. SWMBF&O just shuts car off and restarts and it runs better but CEL is still on. Switching to single electrode plugs slowed the CELs some, but we still get them.
96 1.9 Z3 black/tan/black
97 M3/4 estoril/gray
08 Kubota 3400 HST orange/charcoal
08 GMC Sierra stealth gray/gray