My 87 Turbo II has 155,000 miles on the original engine, and has been running very well until I removed my vaccuum rack and solenoids. I got the car all back together using new silicone vaccuum lines and new fuel line, and fixed what I thought to be every vaccuum leak. The car seemed to be running quite well so I took it for a drive and floored it in second gear. Afterwards, when I pulled up to the stop light, the car didn't seem to want to idle. I limped it home, where it is now. Just today I did a compression test with a good healthy battery on a warmed up motor and yielded 74 psi on the rear rotor and 80 psi on the front rotor. I know these numbers are so low that the motor could basically blow any second, but the test was even on all faces and pretty close between rotors, so I assume it should still run. My question is will a motor with consistent but very low compression experience problems like I am seeing? Should it still be able to drive until an apex seal goes, or are my seals overall too worn for it to be able to run properly?

Thanks in advance.

 

you probably blew off a vacuum line or have a leak in the intake somewhere.