1989 dodge 350 islander edition stalling problem
 

I am looking for some help with a problem that the mechanics just cannot solve. the problem only happens on a hot day after about an hours worth of highway driving the van just stalls even at highway speeds. if i wait for about half an hour to an hour it will start up again and run for a short while and then stall again. i have replaced the pick up in it and done plugs and wires and the previous owner had a bunch of work done to it as well. I have had the van in the shop and they have had it idle for a hour or so just to get it up to temperature and it was working just fine. i took it camping on the weekend and drove for about 2 hours without any problems , but on the way back the temperature was about 32 degrees celcius and about a hour and a half into the trip it stalled and left me stranded for about an hour. any help would be greatly appreciated as i am getting a little frustrated.

thanks Steve

360 V8 with an automatic trans? Is it throttle body injected or carb?

360 V8 Automatic with a throttle body.

Have you tried another computer? I'm wondering if the heat is causing it to cut out.

Was the Hall effect pick-up replacement that was installed, a new one?? 'Cause that is the symptom of a defective unit.