86 Ranger won't stay running

[NvrNoWht2Pik]

I bought an 86 Ranger 2wd 2.9L a couple months ago. It has fuel injection. The truck had been sitting for several years. It needed a clutch and had run out of gas so the previous owner just left it in a field. I've changed the clutch and slave cylinder, given the truck a complete tune-up, installed a new fuel filter, and put fresh gas in the tank. The truck starts right up. After it runs about 5 minutes it dies and has to sit several minutes then will start right back up. I replaced the ignition control module (on the distributor) and even have taken the catalytic converters off (in case they were clogged), and it still acts the same. Truck starts, then dies, and so on and so on. I've only been able to drive it back and forth in the driveway. Does anyone have any ideas what the problem may be? I really need to get this truck running right asap. Thanks for any help.