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Thread: Misfires please help. 2006 grand prix gxp 5.3 LS4

  1. #1
    Tuner in Training
    Join Date
    Jun 2009
    Posts
    25

    Misfires please help. 2006 grand prix gxp 5.3 LS4

    I replaced spark plugs, wires. check gap.
    torque down plugs.

    i don't notice problem. but when scanning I am getting misfires . less than 25 mph..

    I can post the last scan. small file if someone is willing to help diagonose issue.

    do I have a bad sensor? , no driveability. issues. and no codes so far. besides evap failure.

  2. #2
    Senior Tuner
    Join Date
    Jun 2005
    Location
    Southern FL
    Posts
    2,044
    And what sparkplugs did you go to?
    Formerly known as RWTD

    Toys: '22 Tesla Model S Plaid / '20 Chevy Duramax / ?20 Sea-Doo RXT-X (2)

  3. #3
    Tuner in Training
    Join Date
    Jun 2009
    Posts
    25
    NGK Iridium/ MSD wire set. 8.5 super conductor.