1994 Explorer Stall

Hi All,

I've got a '94 Explorer and as I was driving on the hottest day of the
year so far (31C) on Wednesday, my truck lost all power and was barely
idling. I pulled off the road and put the vehicle in park. It was
sputtering and wouldn't respond to the gas pedal at all. I finally
shut it off and let it sit for a few minutes. It fired right up and
idled for 20 seconds and then the same thing happened. I got a ride
home and left it overnight. I went back the next morning resigned to
paying the tow bill to get the truck home but wanted to drive it as
far as it would go. Wouldn't you know that it started right up and I
drove it all 40kms home. I checked the fuel pressure at the rail back
home and it was reading a solid 30 psi, which is what it's supposed to
be. Any idea what else could have caused this? I'm along the line of
the ignition modules getting too hot. Thanks!