2003 CHEVY AVALANCHE CYLINDER MISFIRE

  • Tiny
  • Carl Kingsbury
  • 2003 Chevrolet Avalanche

Computer problem
2003 Chevy Avalanche V8 Four Wheel Drive Automatic 89000 miles

What would cause #4 &#6 cylinders to misfire at the same time. And suggestions for repair

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Sunday, June 29th, 2008 AT 11:00 AM

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  • Tiny
  • rhall77
  • Member

Possible bad head gasket, bad injector wiring, bad PCM, bad plug wires, injectors need to be cleaned. Most likely a vaccum leak at the intake manifold. There can be a whole list of things. Did you check to see if thre was spark at the plug wires and injector pulse at the fuel injectors. Also check for a vaccum leak at that point of the intake

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Monday, June 30th, 2008 AT 7:52 AM

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