Originally Posted by Dreemer
I have a v6 and one side got oil on the spark plugs. It has rough idle making the rpm needle moving up and down. I think the rough idle is from the EGR valve, but why would oil be on the spark plugs? Could it be a bad gasket?
Oil on the porclin part or the actual diode? If its on the porclin then you need to get a valve cover gasket kit(very inexpensive)....If its on the actual diode, then maybe your piston ring(s) are shot... And a bad egr valve can cause really bad idling....