I'm having very similar symptoms. When my car heats up it tends to buck when I'm cruising at part throttle. If I'm at a stoplight too long it sometimes just dies. When I'm cruising at low speed through a parking lot or coming to a light the car sometimes dies. It cranks forever until it starts again.

Also, if I go to the store or something and come back out, the car is still good and hot and I really have to crank it/play with the throttle to get it to catch and start again. Please let me know what you come up with.

 

you might wanna check out your fuel pressure regulator and/or your compression

 

i suggest you go trhough the same steps i did to figure out mine. Seeing as my prob was the fuel pump you might wanna check that. Since it does still start but has a hard time your gunna get power all the way back untill its actually in the gas tank and at the pump(if thats what the prob is) But like i said i had no idea what mine was and it just turned out to be a superhidded wire in the tank that managed to mangle itself apart. The trouble starting was from the weak connection but when it finnally did give it wouldnt start for ****. And unlike me you dont want to be out driving when that happens cuz then its flatbed all the way home