Thanks for all the repiles. Ok I gave in and went to the dealer heres what they found. changed the connector on #7 coil pack and the spark plug was bad replaced.The tapping noise they think that a peice of the old plug may have nicked the cyclinder and the noise should go away,I lost 2% comperssion which is still causing a rough idle they said this should also go away. Well this morning the check engine light came back on and started to flicker until it went steady. CMAN where do I refer to the ## you posted? 04-16-1 and 05-15-8 and you can hear it better by the front tire well.