Fuel pump when does ele fuel pump come on?

Have you checked base fuel pressure with a gauge ? Can you jumper the pump relay to make the pump run with the key on ?
Are you loosing spark when the engine dies ?

Check your fears and your relay for your fuel pump

there is a recall for the inertia switch, may not be tripped but its not letting voltage thru.other than actually checking for power at the fuel pump.top of the fuel tank.

When you turn the key to on, not start, do you hear the pump turn on for a couple of seconds to pressurize the fuel system? If you do, check fuel pressure with a gauge, should be over 50 psi if multi port injection, about 20 psi if throttle body injection. If pressure is good, you may need to check the fuel injector circuit.
If no sound from the pump, you will need a voltmeter or a test light to check the fuel pump circuit. First check the fuel pump fuse. Then check for power at the gas tank on the fuel pump wire, when the engine is being cranked over. Power should be going to the pump then. If nothing, move back to the fuel pump relay-need to check for power at the relay.

This is for Z28--5.7L engine. I'd have to check voltage and ground for the fuel pump. At the fuel pump connector, gray wire is voltage, black is ground, check them both. Sometimes fuel pump will run but won't make good pressure, if any? You could jump load side of relay to see if pump will run and make proper pressure. The load side is that arm with arrowhead.
Engine cranking, you have spark at the plugs and fuel injector pulse, just trying to see if you have more than one problem?

you may have a stuck relay

always check fuel pressure and "pulse"at injector .

change the injector,its the only thing left

You need to replace the PGMFI relay up under the drivers side dash. It is sometimes called the main relay or the fuel injection relay. It is 1"x1"x2" and will have "mitsuba" written on the side. If you get it out, I can tell you how to fix it for free if you know how to solder, or you can by a new one at any auto parts store for about 50 bucks.

have a ford garage check out the fuel pump don't do it yourself if you do it will be so messed up they can't even fix it trust me i did i had to scrap the car