Stalling

I have a 96 Caravan 3.0 with 3 speed trans. It has developed a stalling issue. The car will start up, idle and run fine when cold. Seems that when it is up to operating temp. it stalls. Can be while running at 70, or at 40, or when comming to a stop or while at a stop. Doesn't seem to matter. Will not restart immediately. Seems like it takes a minute or two to restart. Seems like the puter is reseting itself. That is my impression. Then it starts and runs fine. Then will stall again in a couple of miles. Have had the codes checked at Autozone, no codes?????? Any and all help will be appreciated.