I need help soon

Ok i have a 1994 E150 with the 5.0 in it and it wont start. So heres the whole story. Ive been working on this thing for a while you know replacing things its kind of old. It has always started fine. It cranks but wont start. Before it quit the idle would lope when the engine was warm. One day I replaced the pcv valve and the vacuum line for it and then it would not start. We just had the fuel pump replaced and it has new plugs wires cap and rotor. I am not sure i have some ideas but dont just want to go replacing things i dont need to so any help would be appreciated. This is my only vehicle so i need to fix it now. Thanks

Use a 12volt test light connect the ground to the negative battery terminal. Place the end on the coil negative with somebody trying to start the car. If the light doesn't blink the pickup in the distributor is bad. If the light blinks take the module on the side of the distributor to Advance or Auto Zone and they will check them free. If you have two injectors remove the air cleaner and spray starting fluid in while somebody is trying to start if it starts you have a fuel problem. I think the fuel pump and eec relay is on the drivers side fender make sure they click when trying to start.

Thanks I will try that