Maybe someone has run into this before

Tiny
PSCHAFER
  • 1984 CHEVROLET SILVERADO
  • 182,000 MILES

Maybe someone has run into this before. After I bought the truck a year ago I had to replace the heads (new rebuilt heads) and found that when I got further along that the cam lobe on #6 was completely worn, no lift whatsoever.I didn't have the time or place to replace it so I got a mechanic to replace the cam and lifters. It had a miss before, but chalked it up to the cam. After the work was done it still had a miss to it.I put a new quadrajet on it because i'm trying to stay as original as I can, and the miss is still there. So what next!I was thinking maybe bad valve on the new head, or distributor, but the miss has no rhythm to it (i.E. 123-miss-5678) it is sporatic. Correct me if i'm wrong, but if it was the head or dist it would have a miss at the same valve or point on the dist over and over!The only thing I can think of is fuel. New lines, tank, etc. Anybody have any suggestions?Thanks

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Thursday, March 28th, 2013 AT 12:02 PM

2 Replies

Tiny
ASEMASTER6371
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  • 25,554 POSTS

Start with a compression test. Then put a vacuum gauge on the motor as well.

Did you replace the plugs, wires, cap and rotor?

Roy

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Thursday, March 28th, 2013 AT 12:05 PM
Tiny
PSCHAFER
  • MEMBER

Haven't changed the rotor, but has new plugs and wires. I will have to try a compression test. That would be a lot easier than changing the fuel lines and the tank.

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Thursday, March 28th, 2013 AT 12:26 PM

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