i swear these damm cars do my head in.

every few weeks or so when i'm sitting in traffic the car will just die. no warning, no hesitating, backfiring, loss of power, it just dies. then it wont start again until its given a bump start, jump starts dont work. i've really no idea what it is. i've checked all the earths and cleaned them all up and it was fine again for a few weeks. this it the fourth time its happened now and its just getting to the stage where i cant use the car everyday, its gonna have to go.
fucking cars