I had a similar problem a couple of years ago, turned out to be the fuel pump was cutting out.
The way to find it was to put a fuel pressure Gage in line and read it in the car as I drove. I saw the pressure suddenly dropped to less than 2 PSI and the car died.
A quick way to check for a fuel problem is a can of starting fluid. If it dies and you can get it to run off the starting fuel, then you have a gas delivery problem.
Hope this helps.
