2001 Mercedes Benz SLK320 High idle

2001 MERCEDES BENZ SLK320
110,000 MILES • 3.6L • 6 CYL • TURBO • RWD • MANUAL
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CHEVYPALOMARES
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When i start the car it idles at about 4000 to 4500 rpm and it stays that high all the time.
If it helps: this problem started 4 months ago back then it would idle at about 2000rpm when in neutral or parked i was told that a vacuum leak was the cause but i couldnt find it.. And since then i start the car here and then to try to find the leak, but like i said now it's idling @ 4000 to 4500rpm so i cant let the car running for long can you tell me if you think a vacuum leak is the cause for this problem?
Any help will be greatly appreciated
Jan 22, 2014 at 9:10 AM
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MHPAUTOS
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May well be a vacuum leak or a problem with the IAC system, you can use a length od vacuum hose as a stethoscope, place end in your ear and place other end around manifold and throttle body etc. and you can pick up a vacuum leak hearing the sucking noise.
Jan 22, 2014 at 2:12 PM