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  1. #1 Re: High idle at times 
    97gtsc
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    Default 03-16-2010
    Throttle position sensor or idle air valve going bad?

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  2. #2 Re: High idle at times 
    shawngtp
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    Default 03-16-2010
    Battery voltage is low or your alt is starting to go bad. Your pcm is not seeing the correct voltage so it rases your rmp's untill it sees it. Just my 2 cents I could be wrong..
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