02 grand prix is stalling

[some dude]

i have a 2002 grand prix gt (3.8 L). it runs and drives great when its cold but as soon as it warms up it dies. it wont start after it dies but it turns over just fine and even fires. if i wait till the next day it will run and drive just fine again till it warms up. ive changed the fuel pump, fuel filter, igntion module, crankshaft sensor, and the fuel pump relay switch. I was told to try the mass airflow sensor next. but it seems like if that was the problem the car would run bad right before it died and it doesnt. does anyone have any ideas? oh, and i changed the coill packs when i changed the ignition module.

thanks "B"