1996 Ford Bronco engine hesitates when restarting hot

The truck has 168k miles and usually runs great. during the summer months, if i shut the truck down and restart it within 10-30 minutes, it has problems. the truck will start but is stumbles, hesitates, burps gags sputters and then it finally dies. I have to press the accelerator to give it some extra gas to keep it going. once it gets going, it runs like a champ. the problem started last summer along with a P071 and a P074. (system too lean banks 1 and 2) i replaced 3 O2 sensors, the MAF sensor, plugs and wires and fuel filter. the problem and the codes went away. this summer, they're back. sputtering engine and codes. not sure if they're related but i cannot figure it out. help!!!