Mechanics

WHILE MY ENGINE IS RUNNING THERE IS A SKIP/JUMP, I CANT TELL WEATHER ITS DOING THE INTAKE, COMPRESSION, POWER OR EXHAUST STROKE. ANY IDEA WHAT THAT COULD BE?

1987 Chevrolet Caprice • 135,567 miles

The motor was just rebuilt and I was out test driving it. I shut the engine off then started it back up and it would run smooth then jump, run smooth then jump and it keeps doing this in park. When I put it in drive and I accelerate I hear a popping noisen when I come off the gas and let it coast the popping noise backs off but the engine is still jumping. I dont know whats going on. Any suggestions?
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Termitettp
January 4, 2012.




The popping may be a backfire. Check all the plugs wires to be sure they are tight and not touching anything hot.
Check all your grounds as well for good, solid connections.

Roy



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