Does your dash idiot lights come on in the on position?
If the voltage is low or not getting good voltage the engine will be difficult to start as the ECM voltages may not be high enough for sensors.
After the fuel pump runs for the few seconds, the power to the pump comes through the oil pressure sending unit. Verify that the connector is tight on sending unit. It should have voltage on the orange wire. this is the same orange wire coming from the fuel pump relay. It then sends power to the pump on either a tan/white or grey wire.
Do you here the fuel pump run. Have helper turn on ignition switch while you listen close near the tank.
Hows you fuel filter? On frmae rail passenger side near rear axle.
