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Thread: 454 Wont start.

  1. #1
    New Member
    Join Date
    Feb 2012
    Posts
    1

    Angry 454 Wont start.

    1999 K3500 7.4

    Truck will sit for weeks without starting but occasionally it will chug vary slow and even rotate back words a 8th turn and than it will fire and run great no issues for a month to six. Nothing changes I have replaced everything
    Sensors: cam, crank, map, o2, mass air, ambient air, knock.
    Also, the computer , coil, cap, wires, plugs,

    I don’t know what else to do it is not starting right now

  2. #2
    Lifetime Member
    Join Date
    May 2010
    Posts
    507

    Default

    Post up tune. Then next time it starts do a log while it is running. Have you confirmed the fuel pressure is good?
    1997 S10, 06 trailblazer SS LS2 swap, 4L70E trans, 76mm turbo. Factory ZQ8 suspension. 3.08, G80 w/a zexel. With a 0411 swap.

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