You didn't mention which car you have, so I'm assuming a G2 Legend. In that case the first place to check is the main relay (fuel relay) for cracked solder joints on the relay board. Typically when the car gets hot the joints come apart and the fuel pump stops working. If it won't start, turn stereo off or down and only turn the key to II where the dash lights come on. You should hear a humming sound coming from the rear seat area, that is the fuel pump priming, if you don't hear it then check the main relay. GL