Thread: 2003 3100 Woes

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  1. #1 2003 3100 Woes 
    Cornholeo1
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    Question 04-16-2012
    My daughter has a 2003 Grand Prix with the 3100L. She was driving and the check engine light came on and was flashing. The engine has a sharp tapping sound from the rear valve bank. Cylinder 3 has a misfire was thrown by the OBD. I have checked the compression and all cylinders range from 160 to 179 pounds. Any body seen this one before. Thank you!
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  2. #2 Re: 2003 3100 Woes 
    Steel Armadillo
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    Default 04-16-2012
    Taps all the time? Taps at idle? Taps worse at WOT?
    What exactly was the trouble code?
    Last time you did an ignition tune up?
    Mileage?
    The evil LG8 still refuses to die.
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  3. #3 Re: 2003 3100 Woes 
    dpzelenak
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    Default 04-16-2012
    same^^
    need more info to help out

    SMGPFC Member #10
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  4. #4 Re: 2003 3100 Woes 
    dsmuts
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    Default 04-16-2012
    How many miles and has the lower intake manifold gasket ever been changed?
    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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  5. #5 Re: 2003 3100 Woes 
    Steel Armadillo
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    Default 04-18-2012
    thread: FAIL.
    The evil LG8 still refuses to die.
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