ive got a oil leak at the back of the motor and i thought it could be oil return line but when i replaced the old tgv deletes with ported ones i noticed the jb weld that was filling up the tgv holes had some oil residue on it. any ideas? would a faulty pcv valve put oil in my intake and cause the cylinder 1 and 4 misfire codes? also does anyone know where i can get a stock oring to replace the one i lost the other day when i was putting everything back together? pretty much running around in a circle with this car lol