2001 Mercedes Benz SLK320 High idle

Tiny
CHEVYPALOMARES
  • MEMBER
  • 2001 MERCEDES BENZ SLK320
  • 3.6L
  • 6 CYL
  • TURBO
  • RWD
  • MANUAL
  • 110,000 MILES
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
Wednesday, January 22nd, 2014 AT 9:10 AM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
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.
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Wednesday, January 22nd, 2014 AT 2:12 PM

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