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  1. #1

    Anybody Know Why High Idle On O4 Gtx

    2004 GTX SC, Throttle body looks good, and its going back to the stop position, Just installed RXP ecu and knock sensor harness, and changed sc washers. It idles between 2200 and 2500 nothing less and runs awesome

  2. #2
    King_Of_Fun's Avatar
    Join Date
    Jul 2007
    Catawba Island, Ohio
    Did the TB come with the ECU or is it the original? If it's the original, it needs to be matched to the ECU with BUDS... Ron

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