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Engine Miss Fire at Idle

This is a discussion on Engine Miss Fire at Idle within the GTO forums, part of the Vehicle Specific category; Need some help here I have some engine miss fire at ldle no vacume leak and new injector and mainfold ...

  1. #1
    Junior Member
    Join Date
    Mar 2010
    Oak Lawn/ Chicagoland

    2004 GTO

    Engine Miss Fire at Idle

    Need some help here I have some engine miss fire at ldle no vacume leak and new injector and mainfold and this was doing this before but i was told from GM Techline that Ls1 have alot off problems that valve seat drops and cause miss fire I don't buy this Also I'm a GM tech also engine only have 24k on it

  2. #2
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Paterson/Ridgewood, NJ

    Phantom Black Metallic
    2004 GTO M6

    Have you checked your coils and wires to see if they are damaged? I know I had a miss a few months after I bought my car. Turned out to be a broken wire at the plug boot. But the wire was still in the boot despite the conductor being broken.

  3. #3
    Member 4thGenTA's Avatar
    Join Date
    Mar 2009

    2002 firebird trans am

    Make sure that all your spark plug wires are on good and not loose....

  4. #4
    Senior Member TLS_Addict's Avatar
    Join Date
    Mar 2008

    Ray Charles blue

    Like said, check your plugs/wires. Also, any modifications done to it?

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