96 olds 88 stalls

3800 stalls after driving 40 miles/1 hour or so, wait 30 seconds starts and runs for a while, have changed ecm, maf, throttle position sensor, shows NO codes on scantool, maybe fuelpump??????? oh forgot to mention car runs fine in cold weather and only exhibits this problem in warm weather 55 degrees and above, runs great all winter long

hmmm... not too sure.... does it restart right after it stalls?

When it won't start do you have spark and injector pulse, doe this happen at speed or idling?

normally car will restart and run after 30 seconds or so, yes have spark and pulse, happens both at high speed and idling

UPDATE today: replaced cracked vacuum hose a fuel pressure regulator by TPS...we shall see!! thanks for all the help so far