[Joe50]

I bet it is the Hall Effect sensor inside the distributor. Ive had the same problem on my '93 before - no start when hot, just mine would die when going down the road. Ford calls this part a stator and they had it in stock for my car, about $70. The only problem is that to change it you have to press the gear off the distributor with a press. If not you could just replace the whole distributor. I hope this helps.

Joe50