While driving for more than about 20 minutes it loses all power and dies. The gauges go to zero and after a few minutes it starts back up. Took it to a mechanic and they replaced the computer saying it was bad. It was hooked up to some diognostic equipment and apparently the computer wasn't sending the right voltage to the car when causing it to die. Any other suggestions. It is a 2.0 manual tranmision 4 cly.