POS 89 3VZE

Hello all, Have a 89 3.0L V6. Recently did an engine swap with a 94 3.0L 4-runner engine. When I go out to start the engine cold, it starts right up no problems. If I let it run for more than 5 minutes and shut it off then it does not restart. It will crank and I have spark but no fire. If I spray some starter fuel in the brake line then it will turn over and keep running. Otherwise I have to wait 5 hours until the engine cools down, then it will restart again. Any thoughts? Figured it had to be a sensor, but not sure which one to look for. Is there any reason the computer would tell the injectors not to fire when it is warm?