My 560 SL will not run properly on hot starts. It starts fine, but idles at very low speed ~450 RPM and will not develop enought power to run the car when put into gear. Also,the car has never idled above about 600 RPM; there is no "high idle" even on a dead cold start.
Throttle position switch and idle speed controller have been replaced. The idle speed control valve seems to be OK since the idle will speed up to about 1500 RPM when the electrical connector is disconnected.
Does anyone have any experience with this that may be able to help me.
James L. Lloyd
1988 560 SL