Backfires when I accelerate full throttle?

2005 CHEVROLET SILVERADO
198,008 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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REGINALD DANCY
  • MEMBER
  • 1 POST
My truck starting backfiring when I get on the gas pretty hard. doesn’t do it at idle and doesn’t do it when driving normal just when I get on the gas real heavy. what could be the problem?
Apr 14, 2020 at 7:20 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

This is usually a result of a worn camshaft or lifter not moving the valves enough for producing power.

https://www.2carpros.com/articles/engine-backfires-while-running

I would remove the valve covers and insect the movement of the rocker arms while cranking to see if there are any that are not moving the full distance.


Roy
Apr 14, 2020 at 8:54 PM
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