[rhomanski]

If you have another battery, try switching them. I had one do that years ago on a different car. Also have seen a fuel filter collapsing internally and causing that. It would run for five minutes and then die. Wait 15 minutes and it would fire up like a brand new car. After that, maybe a relay, computer, the sock in the fuel tank? Coil, Distributor cap? I had a cap cracked years ago that would idle terribly until I went down the road a couple hundred feet and then it would smooth out and run perfect. How is the power? If it's down I would suspect ignition first. I might get closer with my guesses if I was there.