Just wanna say hi to all. Ok I just bought a 90 mazda b2200 5sptruck and the owner told me that the problem is the piston rings cause it was smoking. Ok i towed it home and did a compression test right before it got dark and what i got was 85psi right across. Is this reading telling me its not the piston ring and it could be something else. Is 85psi low. Should it be 120psi or more. I check spark from coil and got spark cause i couldn't get the car started. What i notice also was the vacuum line are all block but it was running like that before truck sat. I will check timming marks in the morning.I appreciate any help you can give. Thanks

James