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info - misfire on a 2001 chevy tahoe 5.3 code PO300

Discussion in 'General Chevy & GM Tech Questions' started by x1078p, Aug 18, 2009.

  1. x1078p

    x1078p New Member

    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:gasp:
  2. Z71_guy

    Z71_guy Epic Member 5+ Years 1000 Posts

    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
  3. 2ToNe04

    2ToNe04 Epic Member 5+ Years 1000 Posts

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

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