With no injector clicking at all, it is either a dead ignition (the signal goes to the ECU from the coil, there’s a bullet connector on the water rail, should produce a click every third time with the ignition on).
Do you have spark while cranking?
Or it is an ECU problem. I wonder why it would click on full throttle, since the injectors click, even if the AFM flap is closed. Fuel pump running doesn’t have anything to do with injectors. The injectors can get disabled with the throttle closed, but ONLY above a certain rpm, above cold idle speed.
Does anyone know whether the starter relay (oblong silver can on the bulkhead) has any say in ECU operation? I know that it powers the pump and it might do more than that…
At least it’s still daylight, I know the gas station feeling. My fuel pump had disconnected itself and we pushed it out of the way in the dark. Good luck!