Thread: UPDATE > High Idle - problem solved - IAC Valve ( Intake Air Control Valve )

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  1. #1 Re: WTH ?? -- 3900 RPM in Park & Neutral, 1800 RPM in Drive -- what gives? 
    GrandPrix Junkie
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    The 3100 has lots of places for vacuum to leak. There is a hose that goes to the rear valve cover that can cause some issues, the T-hose under the bracket for the throttle body splits and leaks, plus the awesome LIM gaskets. Lots of stuff to look at. Figured since you were close by, you might want to swing down for diag, but it's all good.
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  2. #2 Re: WTH ?? -- 3900 RPM in Park & Neutral, 1800 RPM in Drive -- what gives? 
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    Quote Originally Posted by hitman92499 View Post
    Figured since you were close by, you might want to swing down for diag, but it's all good.
    Thanks for your help man. I just don't know if it's safe to drive on my brakes, I don't feel too comfortable driving more than 5 minutes like this. I'll let you know though, thanks.
    Last edited by turboLude; 08-25-2012 at 10:09 AM.
    2001 Pontiac Grand Prix SE, 3.1L
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