Engine cranks but won't start, no fuel. Fuel pump and filter just changed. Accident button reset although the button feels free, no clicking or activating.

Have you checked the fuel pump relay to see if it is sending power to the pump ? The computer grounds the relay when the computer "sees" oil pressure or engine RPM.

Sounds like maybe the main computer is bad. When you cranked the engine there is not any indication that it is firing. If you have changed the fuel pump and coil and it still wont even fire, the computer is most likely the cause. Even if the timming was off you would still get some indication that it was trying to start although it probably would not if the timming was off, but the fact it's not even trying to fire yeah that's my take.

Rather then guessing as to what the problem is learn to test ! Check the electrical circuit , hook up a fuel pressure gauge , use a spark tester to see if it has spark . Do you like buying parts you don't need ? Other wise your better off having a qualified repair shop check it out .
Testing Electric Fuel Pump Problems with Voltage Drop Test

Fuel Pump Electrical Circuits Description and Operation
Test the fuel pump relay ,do you know what a relay is and how it works ? Ford fuel pump electrical analysis begins at 8 mins into the video .
Do you know what a wiring diagram is ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size. Under system click on engine ,then under subsystem click on fuel controls . Click the search button ,then the blue link . scroll down to diagram # 7 ,this fuel pump electrical circuit .

Test don't guess

Most Fords have a fuel reset button. When you ran out of gas you tripped the circuit. Most of the time the button will be on the passenger side by the kick panel. The exact location should be in your owners manual or your local library or auto parts store will have a copy of one for your specific vehicle.

check all your rounds on the body, behind kick panels, and in engine compartment. The relays you hear clicking are the power relay whcih turns your engine computer on. The other relay is the fuel pump relay, which is turned on by the engine computer. start there, report back.

PS. When you press the gas pedal to the floor during cranking, it shuts off the fuel supply to clear a flooded engine.

Well i would change the fuel filter first. Then if that doesn't fix it there might be a reset button on the inside of the trunk for the fuel pump actually look for the reset button first. If you don't have one there is a relay switch under the hood sometimes they fail. You have three Ac,Fuel pump, door locks. The way i do it is turn the key on have some one put there hands and feel for the switch to work when you engage the power locks mark it with white tire crayon and feel for the ac when you turn it on it will still click even with the engine not running. mark that one also, Now the last one has to be the fuel pump relay turn the key on and it should click. if no click is heard? You have a bad fuel relay switch. replace it. If you feel the click and hear it? That would mean the fuel pump is bad. And these are in the tank. But please go with the easy stuff first. it might seam a waste of time checking the relays and marking them but i always fo this and mark them. cause you never know when your gonna need to find the relay something.
Good luck!
Hope i helped.

if the inertia switch had to be reset for truck to start and you were not in any accident inertia switch is faulty.... if that isnt the case make sure the fuel pump is opperational....( Turn the ignition on without cranking the motor and listen for the fuel pump (a whirring sound) It should make the sound for about 3 seconds and then shut off this is how it is suppose to opperate....also if not done recently change the fuel filter....

if fuel is being delivered,look for an ignition problem (module,relay,distributor). you need 3 things to fire up an engine 1 compression 2 fuel 3 spark

You said you have fuel flowing from the inlet line of the injection pump? But not at the injector lines?

check your fuel pressure. also look in your owners manual for the fuel pump inertia switch sometimes they can trip by being kicked or bumped. it is designed to cut fuel off in case of accident.has a reset button usually located in trunk or rt side kick panel