[tempfixit]

Before replacing fuel pump hook up a fuel pressure tester after the fuel filter and monitor the pressure ( tape tester to windshield wiper and drive ). Have you removed the hose from fuel pressure regulator to see if gas is in the vaccum hose, if so replace regulator. Can you hear the fuel pump run after it dies??? (turn igniton switch on, fuel pump should run for 5 seconds then shut off)

Seriously thou I would remove the distributor cap, rotor and cover over optical sensor (camshaft sensor) and check for brown dust on the sensor. If dust is present the distributot shaft bearing is bad and distributor needs to be replaced, also if optical sensor is bad distibutor needs to be replaced. You may want to get a used distrbutor from a salvage yard. When it dies do you have spark????

How many miles on vehicle???

Yes a fuel pump can cool down and work Again.