i have the same car and it's more than likely the theft system. you need to turn the car onto accessory or on ( i can't remember which) and let it sit until the theft light on the left side of the dash stops blinking. then turn the ignition off for a few seconds and then the car should start right up. i had the same issue about 3 weeks ago and she's drove like a charm since. (except for the head gaskets blowing) lol
