Thread: 2003 Grand Prix 3.1L high idle! need help!

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  1. #1 2003 Grand Prix 3.1L high idle! need help! 
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    P0452 code came up. car idles at 2100 rpm. any idea?
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  2. #2 Re: 2003 Grand Prix 3.1L high idle! need help! 
    Moderator dsmuts's Avatar
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    Check for vacuum leaks
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  3. #3 Re: 2003 Grand Prix 3.1L high idle! need help! 
    GT Level Member lewis1952's Avatar
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    Reving that high I agree with DS. Get some carb cleaner and shoot a couple bursts around any vacuum line and around your intake manifold see if it revs up.
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  4. #4 Re: 2003 Grand Prix 3.1L high idle! need help! 
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    Throttle cable hanging up is a possibility. But seeing as ur also losing coolant, I'd check lims
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  5. #5 Re: 2003 Grand Prix 3.1L high idle! need help! 
    SE Level Member Badgers4life's Avatar
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    I would definitely check for vacuum leaks and check you TB. Any other issues with the performance?
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