engine problem

Have 93 ford e150 5.8 was running fine. Then at a stop sign it died as if I had turned the key off. Would not start until It cooled. Then when it reaches operating temp again it dies. Have replaced gas filter, fuel pressure reg, dist module, distributor pickup coil and coil-- -out of ideas. When first started cold it runs fine. Also noticed that when it is still idle and close to operating temp, it starts to run rough and if I drop it into gear or tap the accelerator it dies immediately

Before you throw any more parts at it. You need to narrow down whether ignition issue or fuel delivery issue. Can of starting fluid next time it won't start. If it fires up then dies within a few secs/mins. Fuel delivery. No start, check for good spark. Just a guess, but fuel pump may be dying when it gets hot.