car dies after driving for a 1/2 hour. i put a new battery, alternator and the thing still dies on me. i dont trust it to go down the street. i took it to a buddy at the garage and he checked the alternator and it was good. i charged the battery yesterday and took it out and it ran for a hour this time but it did something really wierd. it lost all power. i mean the motor was running but it wouldn't go anywhere. after a few min. it started to go again so i took it home and when i turned it off i tried to start it again and it was dead..... wtf