What causes backfiring/rough engine acceleration shaking

1998 CHEVROLET SILVERADO
199,999 MILES
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PELACAMAN
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In 1998 chevrolet silverado 350 5.7L c1500 ? I changed spark plugs, spark plug wiring, gas filter. Backfiring.....rough accelertion truck shakes
Mar 2, 2012 at 10:22 PM
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