|
I think that last cylinder gets all the stuff that gets into the manifold. Check your pcv to see if it's sucking in any oil through the line. Also check the crank vent line that goes in near the throttle body. You might also have a plug wire getting weak back there. Check inside the throttle body to see if there is any oily buildup. I would expect that to affect more than 1 cyl though. How many miles on the engine and have you ever replaced the plug wires?
__________________
69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
|