i just said screw it and made an appointment to take it in. but after driving it another day i have come to the conclusion that it is definatly a vibration (a bad one at that) and not the engine. plus i talked to a lincoln service guy who is a family friend and he said if i had any valve train problems, my oil would be dirty, the car would run like crap, and chances are that i would have smoke. and so far the only thing i notice is rough idle. so i guess the only way to know for sure is to let them take a hack at it.
