Well, since I got the Interceptor scan gauge, I noticed that Im having misfires in ALL cylinedrs (only when the car comes to a stop or moves slowly) However, wouldnt the SES light go off with P0300 random misfire code? I changed the wires, installed new coil packs last saturday, and my Autolites 104 are maybe 8 or 9 months old. What in the hell could be wrong here? Are the plugs to blame? I heard Autolites have very short life span.