I was wondering if anyone could help me with this problem my car is having. Some days my car runs perfect wihtout a single problem and then other days whenever im driving my theft light starts flashing then the car starts to sputter and jerk and while that happens all the lights on my dash start to flicker on and off. And usually whenever that happens the next time I go to start my car its like it is dead and the theft light flashes. Ive had both the battery and alternator checked out and they test perfect. If anyone has any advice it would be greatly appreciated thanks.