why is my truck backfiring

1993 CHEVROLET SILVERADO
13,000 MILES
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MJT47
  • MEMBER
  • 1 POST
It doesn't happen all the time but periodically there a knocking sound from the engine I think its backfiring Its the only thing I can think it is.
Mar 1, 2012 at 10:30 AM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,989 POSTS
no CEL? probably have to have someone with expertise there when it happens or wait for it to get worse?
Mar 1, 2012 at 12:02 PM
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