My car would run flawless for like 10-15 minutes in these 90+ degree days, I let it idle in the driveway with a timing light and remote starter switch attached. As soon as it stalled after a good 15 or more minutes I spun the motor over with the remote and squeezed the timing light trigger, oh sh!t flash but no fire! It's fuel!!

you might try it like that to help figure it out.
Again that was advise from 1 Wild RT and it sure helped me.