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
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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