cylinder miss fire and oil on plugs
I have a '97 Crown Vic that was misfiring on cyl 7 (and giving catalytic error codes). I changed out all the plugs. There was oil in 5 of the 8 plugs. After changing the plugs the car runs even worse than before. Very little acceleration, backfires, and the driver side cat converter glows red hot after a trip around the block. I figure that the oil that got into the cylinders would make it run rough for a while, but I think that I've run it long enough for the oil to burn off. Do I need to let it idle for a while or is something else wrong. Changing the plugs was the only thing I did to it. I let it sit for about 2 hours, and it ran really smooth for a while then started losing acceleration and I could smell the cat converter heating up.