Diagnostic Aids
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
A misfire could be caused by excessive vibration from sources other than engine. Check following for possible cause, tire/wheel out of balance/round, uneven brake rotor or drum surface, or a rough road condition. If problem is intermittent, see appropriate TROUBLE SHOOTING - NO CODES article.