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Thread: Advice on fuel pump activation

  1. #1

    Advice on fuel pump activation

    hey guys I just reworked my l86 harness I did not have an ECM so I purchased a brand new unit I have disabled vats patch 1 and 2 and went thru the DTC list and got that all done I have one issue my fuel pump does not turn on when I key on could someone please guide me in the right direction on what to change I'm using an external bosh pump with LS regulator if I energize the pump manually it fires right up any help would be appreciated thanks

  2. #2
    Tuner in Training
    Join Date
    Feb 2022
    I'll try. Are you running the Fuel Pump Control Module? Are the wires correctly pinned?

    If not, there is a FPCM work around/bypass you can search for. I believe it uses a 30A relay to run the fuel pump.