Double check your plug wires and connection to the plugs and coil. I have the same year jeep as yours + auto and am using the live wires and screaming demon coil. When I first put them on they would slip off . I only noticed the problem when I was on the freeway going 65-70 and hit a bump or rougher stretch of road. I would also check for any binding in the auto shifter cable near the tb if you added a spacer or new tb the shifting can be real weird. I don't think it would hurt to reset your computer.
