won't start or it stalls

A problem as you all know my advise would be to replace the onboard computer to the Jeep (They are only 200 bucks refirbished. Mechanic will charge you around 300 total. I had a similar issue with my 1990 jeep cherokee sport and it ended up being the computer (what would happen is, once the jeep and the computer had a chance to warm up it would either stall or you wouldnt be able to start it.) Normally if you gave the car a chance to cool down, you could start it back up after about 3 hours or so. One tale sign would be, if you have a problem starting especially if the car is warm Let cool down. If it starts back up it's the Computer. Hope this helps.