83 f250 I can get it started and it runs great for about a half hour or so and then quits. If I jump it it will start up, if I let it sit for awhile it will start up. I have replaced most electrical parts. I am pulling out my hair now.

You need to check the fuel pump pressure and I would change the fuel filter in the process. Sounds like you may have a bad fuel pump.

Check fuel pressure.

fuel filter / fuel line / carb . sounds like fuel starvation ie slite blockage

Your crank sensor might be the culprit that's causing your problem. Have it checked.

your fuel shut off valve is sticking or is not getting current from the relay,Thats were I would start looking,I hope this helps you,If it does it all the time it will be easy to find but if it just does it every once in awhile it may be hard to find,and if you are in really cold weather I would really look at the fuel solinold,,please get back with me with a little more info and maybe I can help you more,please do not forget to vote on this solution

mabye the ecm? in the distributer i had a 96 dodge van that quit once in a while but i would have to wait about half hour before it will start.

have fuel pump checked or fuel filter replaced

One of the more common problems with the 2.5L & 2.2L engines that suffered the symptoms your describing, such as, starts & runs good, then at any given time would just quit, not start, but after sitting a while, or by the time the mechanic gets to it, it starts right up, or you sit on the side of the road for 20 min. or half hour then away it goes for a while longer, then quits again down the road. There is a pick-up plate under the distributor cap & rotor, with the wiring plug coming from it. 90% of the time, it's defective, and cuts out especially, but not limited to, more often when weather is hot.

check the fuel regulator,while running unplug the red vacumn hose and if gas squirts out the hole,then it is bad,if not then possibly plugged catalytic converters,drive it on the highway if you can, and stop and look underneath at it and if it looks red,then replace them.Check to see if its overheating,usually a really hot hood tells the story.

check the started solinoid on the passenger fender. Mine would do what you are describing until i put in a new soleniod.