Truck cranks but no start I replaced the fuel pump the fuel lines check the fuses are replaced the spark plugs spark plug coils or ignition coil spark plug wires EGR valve map sensors injectors ignition coil crankshaft positioning sensor and still no start it starts when you put starting fluid in it but dies right away now the fuel pump won't work

Got a truck from the oldest man on earth, 63k, replaced fuel tank, pump, filter, relay, pressure regulator, and injectors, also plugs and wires and battery, map sensor, throttle position sensor, and it still only starts on ether and won't stay running unless I'm putting ether in.