Well first of all I got a 2.5 inch msa header and complete exhaust system just installed. Before I blew it apart it ran good. Now I have trouble starting it, idle is not consistant, it stumbles when you go to rev it, and also when I go to take the #2 spark plug wire there is little change in the idle. When i go to take off the #3 spark plug wire there is no change. Also before I took it apart my electric fan and fuel pump worked fine and now when you turn on the key it does'nt come on at full power. I'm a newbie so any helpwould be greatly appreciated. Thanks, Chris P.