Hello,
I have a 1983 Dodge W350 with a 360. The truck is missing. I did a compression test. I have 2 cylinders that are about 95 the rest are about 105. I put in new plugs/wires/rotor/cap/air filter/fuel filter. No change. When I plug all the holes on the valve covers and pull the PCV, i see a decent stream of blow by coming out. What can I do to find the problem?

Thanks,
Jason

 

Minimum compression is 100 PSI so you are on the edge at best. If the engine runs acceptably enjoy it because you are not far from a rebuild or replacement. You can squirt about a tablespoon of oil in each cylinder and retake the compression readings. This will help seal the rings and tell you if the loss of compression is thru the rings or the valves. In the end you can only expect so much from an old worn horse.

 

Yeah, that's kind of where I'm at with it. It's not my truck anyway. Told the guy to buy something with a slant 6

 

Is it on opposing sides? Change that PCV. Thats stumped alot of guys before. Including me!!!

I wouldn't see where 95 psi would cause a miss. UNLESS it's, burnt valves?

 

Are the cyls next to each other? Could be a broken head gasket between them.