Its an 89 740 GL sedan, non-turbo, B230 F engine. Jetronic L system. I am not sure I have it timed right. It idles rough (erratic RPM....500-800 RPM), it has a strong miss every few seconds (when the RPM dips).....but only when you have it in park! When put into drive--- sitting still--- the idle RPM is perfectly stable, roughness/missing is completely gone. And when moving, the miss is still gone. Went and spent a lot of $$ for new dist. cap & rotor, new plugs, new spark plug wires. Now I notice that it is only running badly when in PARK, so it wouldn't have been any of those parts! If not timed right, can this cause the ign. control module to maybe set the advance way off for PARK, but set it correctly when in DRIVE?
- posted
18 years ago