Lose power while driving then dies before stopping?

The car is a Eagle Talon 95 with manual trans, runs good except for cutting off and has had good upkeep on it. The strange thing is it will randomly cut off while I'm driving but seems to still be running but no power, gas pedal has no effect. I can downshift and just hear the engine rpm winding down but will die before or as soon as I'm close to stopping or slow. If I'm idling or at very low speed this happens very quickly and dead before I can react. Sometimes I can sit and wait 3 minutes and starts right back up but often will cut off again. This may happen two days later or two weeks later. Has no noticeable reasoning for doing this or timing. The best way I deal with this is removing the positive battery terminal for 10 minutes and reset the ECU and then seems fine for days or even a few weeks sometimes. I'm suspicious of the ECU but other things could be be telling the ECU something incorrect. The only dash trouble code I get is (if I remember correctly) is 12 for power disconnect in last 50 cycles because of disconnecting battery. Mechanically everything is fine. I'm a little suspicious of the fuel system and does have a replacement fuel pump off of a Mitsubishi Gallant and has a hotwire on it from the ignition switch that I currently have disconnected. But seems to hum fine and did the noise test the book told be to do and seems to be working fine each time I tested. I've flushed the entire cooling system and fresh 50/50 and doesn't seem to run hot. The car will sometimes cut off after a mile driving it easy. Give me ideas please. Thanks