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Old Jul 7, 2012 | 12:15 PM
  #1  
bbussman40's Avatar
bbussman40
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engine miss

I have a 302 engine that misses. The engine starts and idles just fine, but when I start to accelerate it misses and have lack of power. Once I get up to crusing speed I can't tell if I have a miss until I step on the throdle. I have changed gas, just put in new plugs, distributor cap and rotor. That didn't seem to help. I did notice that the tack needle seemed to jump back and forth a few hundred rpm. Don't know if I have a short n tack wire.

Any buddy that has any ideas would help
 
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Old Jul 7, 2012 | 12:20 PM
  #2  
arctic y block's Avatar
arctic y block
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From: Island Southeast Alaska
What did the plugs look like? Plugs can tell us a lot about the inside of the engine. We just need to know how to read them.

Take a compression check both wet and dry. This should tell you if ya may have like a burnt or sticky valve. And much more.
 
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Old Jul 7, 2012 | 12:27 PM
  #3  
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bbussman40
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engine miss

the plugs all were white, didn't check the compression. Before this miss started I had enough power and the engine ran just fine. Don't know if this could be a vacumn leak.
 
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Old Jul 7, 2012 | 01:31 PM
  #4  
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gfw1985
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Joined: Mar 2008
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From: Raphine, Virginia
Stumble could be accelerator pump. Vacuum leak in the vacuum advance canister or line to it could cause these issues too. Neither would show up at idle.
 
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