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Posted on Mar 29, 2010
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I have a Saturn 2002 SL1 The RPM remain at 2500-3000 RPM when shifting gears. After abotu 30 seconds the RPM will come down to 900 while sitting at a light. What would be the best place to start chasing the issue?

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Jta91

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  • Expert 99 Answers
  • Posted on Apr 22, 2010
Jta91
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Sounds like a dirty IAC (Idle Air Control) valve. It is located on the throttle body. Remove it and clean it throughly as well as the throttle body underside as well where a lot of carbon build up is.

However, since it is such a high idle, check for any vacuum leaks. Check your hoses and lines running inside the engine bay, specifically near the intake. Spray some carb cleaner around while the engine is running to see if you can hear or see a leak. Check the intake gasket as well.

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