I have a 88 M6 that has been having some intermittant starting problems related to some wiring issues due to the improper installation of a Viper alarm system.
BMW tech got the wiring straightened out, and discovered the ignition switch also had some corosion problems. Starting issues now appear solved, but it is running rich.
They tell me I need the valves adjusted to solve the problem. I can't say as I have ever heard of the valve adjustment causing a rich mixture running problem, however, it is computer driven and I suppose there could be a connection.
Does this all sound ...."right"?
Question: How often do the valves require adjustment on a "M5/M6"? I have owned the car for 8 years and noticed it running rich in the past. (plugs fowled)
Valves have never been adjusted since I have owned the car and only about 10,000 miles have been put on the car since I have owned it.