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2002 Chevrolet Express 3500 Question: 2002 chevy express 3500 p0300

 

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kingeb5, 5.7L V8, Arlington, VA, June 19, 2010, 15:28
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have chevy van p0300 cap rotor wires new and plugs still has flashing mil 180 comp all cylinders misfire data cylinder 3 goes up quick spark tester says it is firing though only has misfire counter go up at idle long term ft 4 per bank 2 17 per bank 1 what do i do

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