I have a 1998 GT, Teksid Cobra swapped. Car has been running fine as it sits for about 2 years, with basic tune ups done every so often. Other day car started having a bad miss, and idle issue where it would randomly die at idle. If I killed/restarted the motor it would fix it self for a random amount of time. I changed the the plugs/wires and the miss/idle issue both went away. Well, fast forward two days, I'm driving home and a small miss comes back and idle issue returns. Get in the car to come to work this morning. Start driving, the small miss is still there. Get on interstate and it goes back to the horrible miss. Still, the kill/restart fixed it for a short time. I'm at a loss as to where to start. Ideas?