Originally Posted by 74_jeep
Pull off the air filter houseing , Open throttle and look down the hrottle body . If you see a lot of oil on the bottom of the plenum tray , you very well could have the dreaded intake plenum gasket leak .
Hook a vacume gage up ?
ok thanks alot. will check next time i see it. same as vacuume. have you done one before? how bad?