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High idle?

This is a discussion on High idle? within the General Help forums, part of the LSx Technical Help Section category; My Formula idles arounds 1050rpm. Why would it idle so high? It did it stock and it now does it ...

  1. #1
    Formulatastic yellowv's Avatar
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    98 Formula /93 Z28

    High idle?

    My Formula idles arounds 1050rpm. Why would it idle so high? It did it stock and it now does it with headers, exhaust, etc. as well. I haven't found any vacuum leaks or anything. Any ideas?

  2. #2
    Pathelogical Liar BlackLT1Z28's Avatar
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    94 Camaro Z28

    Is this with the engine cold or warm?

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    Formulatastic yellowv's Avatar
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    98 Formula /93 Z28

    Quote Originally Posted by BlackLT1Z28 View Post
    Is this with the engine cold or warm?
    Both. When cold it is at about 1300rpm and when it warms up it settles to just over a grand.

  4. #4
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    check the pcv hose that connects to the intake. it rots on the bottom side of it where you can't see it. the short hose between the intake and pcv valve.

    other than that, was the car tuned? maybe the tuner set the idle tables that high for some reason.

    next thought is the previous owner turned the idle set screw on the TB.

  5. #5
    Formulatastic yellowv's Avatar
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    I'll check the PCV hose. I would highly doubt the car has ever been tuned. It was BONE stock when i bought it.

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