1979 Chevy Cheyenne popping noise

1979 CHEVROLET CHEYENNE
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LAKERFAN66
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Engine Performance problem
1979 Chevy Cheyenne V8 Four Wheel Drive Automatic

My truck makes a popping noise when I accelerate,sounds like a backfire. I tried adjusting the timing but it still makes the same noise.
Oct 24, 2010 at 6:53 PM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
take your valve covers off and check for a broken/bent pushrod or a cam lobe gone. the best way to test for cam lobes is to start teh vehicle and look for a valve that doesn't operate like the others, like it won't go up and down as much. then you can check for a bad lifter or cam. its 'probably your cam so you'll need to replace cam and lifters.... make sure to lube them with graphite grease before starting the car.
Oct 27, 2010 at 6:32 PM
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