1979 Chevy Cheyenne popping noise

Tiny
LAKERFAN66
  • MEMBER
  • 1979 CHEVROLET CHEYENNE
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.
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Sunday, October 24th, 2010 AT 6:53 PM

1 Reply

Tiny
HMAC300
  • EXPERT
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.
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Wednesday, October 27th, 2010 AT 6:32 PM

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