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  1. #1

    Default info - misfire on a 2001 chevy tahoe 5.3 code PO300

    coulds some one give me some info about a misfire on a 2001 chevy tahoe 5.3 code PO300 random misfire no specific cylinder its just random i changed the plugs and wires same problem
    i need to pass inspection

  2. #2

    Default

    that code can be caused may a multitude of things, try running some sea foam through the gas tank, could be a vacuum leak spray some carb cleaner around and listen for changes in the RPS

    2003 Z71 Silverado LS
    Access roll up cover
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    CB with PA system
    Waiting to be installed
    Two 8in RF HX2 punch( would have 12s but they got stolen)

  3. #3
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    first check if you put the spark plugs right and rewired correctly.

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