Thread: unreported misfire at idle

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  1. #1 unreported misfire at idle 
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    Hey everyone,

    here are the details : 02 gp with the ssm90 3.8 pulley, tb spacer, zzp stage 1 tb, fuel logs, autolite 103's, zzp 10.2mm wires, zzp 2.5" downpipe with high flow cat, k&n cai.

    my issue: every once in a while, not all the time, i will come to a stop and the car will be idling. i will get what feels like a misfire, some of my passengers have even commented on it, above idle everything is ok. Now with a scan tool there are no codes reported.

    does anyone have any ideas? kind of annoying when your sitting in the car

    thanks

    Mike
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  2. #2 Re: unreported misfire at idle 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    These car are well known to misfire at idle when modded. Its pretty normal for it to happen.

    SMGPFC Member #1
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  3. #3 Re: unreported misfire at idle 
    GTP Level Member 01gpgt01's Avatar
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    X2, mine did the same till I started tuning myself. You really need a Plog for that 3.8 pulley. Id just get headers since you have that tiny downpipe aswell.
    2001 GT. A few here and there mods http://www.streetfire.net/video/2001...ynp_208097.htm

    2009 Hummer H3 Solar flare premium
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  4. #4 Re: unreported misfire at idle 
    GrandPrix Junkie machinegunsquid's Avatar
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    ^^ X2

    Mine would misfire under prolonged idle.


    Damn you....make that X3

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  5. #5 Re: unreported misfire at idle 
    GT Level Member torq455's Avatar
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    Mine is smooth as glass.
    2002 GTP: K&N, 3.2 pulley, flipped mounts. ZZP SS headers, 180 stat, NGK TR6's, MSD wires, Reptile ported TB, ported S/C, ported LIM, Intense Stage II heads with larger Manley severe duty SS valves, Yella Terra 1.9 full roller rockers, LS6 springs, Racetronix fuel pump re-wire, Oil pressure "kit", JMB FWI. Mustang dynoed at 240 WHP, 272 WTQ.
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  6. #6 Re: unreported misfire at idle 
    GrandPrix Junkie machinegunsquid's Avatar
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    Nah, it still misfires, you just cant tell, XD

    "**** bills. You can live in your car but you can't race your house" -dsmuts
    Want her to stop when she's not looking karate chop her in her crotch that should quiet her for a bit or at the very least put a smile on your face -REDCOMPG
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  7. #7 Re: unreported misfire at idle 
    GT Level Member torq455's Avatar
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    and that's all that matters.
    2002 GTP: K&N, 3.2 pulley, flipped mounts. ZZP SS headers, 180 stat, NGK TR6's, MSD wires, Reptile ported TB, ported S/C, ported LIM, Intense Stage II heads with larger Manley severe duty SS valves, Yella Terra 1.9 full roller rockers, LS6 springs, Racetronix fuel pump re-wire, Oil pressure "kit", JMB FWI. Mustang dynoed at 240 WHP, 272 WTQ.
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  8. #8 Re: unreported misfire at idle 
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    try running autolite 605's...
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