why does my 2001 Saturn sl2 -72500 miles ocasionaly idle at 1600 rpm instead of 800 rpm,two ase certified mechanichs failed to find problem?
Vacuum leak most likely. You need better mechanics!
Sounds like an idle air control motor failing, I suspect that when you had the vehicle at the shop it was idling normal, that is why they did not see a problem. Vacuum leaks are usually not intermittent.
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