Mechanics

CHEVROLET SILVERADO COMPRESSION PROBLEM

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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Pschafer
March 28, 2013.



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

ASEMaster6371
Mar 28, 2013.
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.

Tiny
Pschafer
Mar 28, 2013.