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High rev at cold start 850 1997

posted by  someone claiming to be chrisq on  Fri Sep 10 01:39 CST 2004 [RELATED]


I'm experiencing or start to notice a high rev at cold start that last 4 to 5 seconds then goes normal. Is there a fault here like air leak from intake, exhaust or air pump? I've had this car for quite a time now and does not even remember if it was already having this high rev before.

Thanks for your suggestions.








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    High rev at cold start 850 1997

    posted by  Rick850R on  Fri Sep 10 14:48 CST 2004
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    The reason the engine does this..it runs at roughly 1500 or 1800 rpm and then settles back down to idle..is that, if the car is cold, then it will run rich for the first few seconds until the computer compensates and corrects for the actual need, and then the idle speed settles to normal.

    Every car I have ever had does this. When the engine is warm, the rpms don't rise as much or at all.








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    High rev at cold start 850 1997

    posted by  someone claiming to be 2850s on  Fri Sep 10 13:35 CST 2004 [RELATED]

    When did you last clean your throttle body?








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      High rev at cold start 850 1997

      posted by  someone claiming to be chrisq on  Mon Sep 13 02:10 CST 2004 [RELATED]

      Hi, I cleaned the TB 2 months ago and even had to replace TB sensor or switch. I also changed the idle motor last year.

      Thanks.








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    High rev at cold start 850 1994

    posted by  someone claiming to be chuck on  Fri Sep 10 10:44 CST 2004 [RELATED]

    I have the same problem. I don't think it always did this. My wife is beginning to complain about this so I would be interested in what other brickboard members say as to what it might be.

    Could it have to do with the idle control motor?

    Thanks







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