I am sure there has been posts on this but I just talked to a guy about this and he stated something about the 3 catalytic converters being the problem. My head covers are leaking oil in my plugs and my car still shakes. I have cleaned out the crank and camshaft sensore last night. The car still shakes. I still have not changed my plugs nor the gaskets, but this guy did fix these iy=tems also on his car. He decided to take it to the dealer and that is where he found out the actual problem was his catalytic's. Does this make sense to anybody? Now that I think about it, the car in the morning does smell like FFAARRRTTTTT!!