I've had the opti job done twice and everything has been fine. I didnt drive the car for about 3-4 weeks. I went to drive it the other day, and after about 10 min of driving, it started stumbling. The rpms were going up and down uncontrollably. It did this for a little while until it just dies. Then it wont start again. If I wait a couple of hours, it will start. So I started it and just let it idle. After about 10 min, it went from a smooth idle to an out of contol idle until it died again. This is driving me crazy! Anyone know whats going on? thanks

 

See if you're loosing spark. It sounds like you have something breaking down after it gets hot. Get you a spare plug wire and a plug. When the engine quits next time, put the spare wire and plug on the coil and ground the plug and have someone crank it over.