2002 Chevy Express BOOGS DOWN AND BACKFIRES

2002 CHEVROLET EXPRESS
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CHAPPYCHUCKLES
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Engine Performance problem
2002 Chevy Express V8 Two Wheel Drive Automatic

THIS VAN HAS 190,000 MILES, IT STARTS EASY AND IDLES FINE BUT UPON ANY THING MORE THAN A GRADUALL ACCELERATION BOOGS DOWN AND BACKFIRES UNTILL IT HAS BEEN DRIVE FOR A HALF HR. OR MORE. THEN IT DRIVES OKAY UNTIL IT COOLS DOWN. THE ONLY CODE THAT EVER COMES UP IS P0302. I DID A COMPLETE TUNE UP MINUS WIRES THEY ARE ONLY A YEAR OLD. STILL NO CHANGE.
Oct 25, 2010 at 8:30 PM
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RASMATAZ
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You need to do something with P0302 could be causing all that problems, check the sparkplug, compression and injector for cylinder no.2
Oct 26, 2010 at 4:05 AM