1990 Mercedes-Benz 420SEL Q&A
1990 Mercedes-Benz 420SEL Question: hard start
Sounds like you need to take it back to the place that did the work. It sounds as though the valve timing maybe improperly set. - irvtech
It is not uncommon for the idle air compensator to get stuck in one position, resulting in the engine idle speed (rpm) being too high or too low. Replacement of the failed compensator may be nece...
The rubber boot connecting the throttle body to the intake manifold tends to crack. This can cause hard starting, rough or erratic idle, and engine performance problems.
where do I spray starter fuel? how do I find air intake pocket?
car stalled while on the road. plenty of fuel(half tank) turns over fine. no prior problems. Any suggestions or ideas