dodge stratus 96 stalling

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.
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I have a suggestion, how about alittle more info.......what engine?
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