I have a problem with my lumina stalling after it warms up for about an hour into driving it.then it seems to be alright after an hour and usually runs fine. I have new feul pump,feul filter ,air filter ,pcv ,plugs ,wires ,ecm ,crank sensor, plentum gasket , and after replacing all of these things it ran fine for about three weeks and has devleoped this problem over the last month which seems to worsen day by day...SOME BODY HELP!!!!!!!!!! PLEASE!!!!!!!!!

You try a spark control module? Under the coil packs. You've done everything else!!