Does the "Check Engine" light come on going from OFF to RUN?
It might be a bad "EEC Power Relay".
The following is my SWAG (Simple/Silly WILDly ASSuming GUESS).

Switch your display to a "Fixed Pitch Font", follow along in your EVTM, and
excuse the poor attempt at ascii art:
+12v-ig.sw.-EEC-P-R(coil)------------Ground.
+12v--------EEC-P-R(contacts)-+---ECA Main Power (aka +VPWR-Vehicle Power)
                             |        
                             +---F-P-R(coil)----pin22(FP on the ECA)
+12v---------------------------F-P-R contacts--inertia sw---Fuel pump--ground.

The above is based on a "typical" Ford with discrete relays and only one (in
tank) fuel pump.

When 12 volts is applied to the EEC Power Relay's(EEC-P-R) coil, and the other
side of that coil is to the vehicle's ground, and that ground is good all the
way to the negative battery terminal, the switch contacts "make" (switch is
ON) and 12 volts is supplied to both the Fuel Pump Relay's (F-P-R) coil and to
the ECA.  The other side of the relay's coil is wired to pin 22 of the ECA.
The ECA is a computer and "boots up". Part of this boot up sequence is to
drive the transistor at pin 22 (designated "FP" Fuel Pump) into conduction for
a short time (I call it two seconds).  If the ECA isn't powered up (maybe
there's no +12 volts from the ignition switch, maybe there's no +12 volts to
the ignition switch, maybe the EEC Power Relay is bad) then pin 22 isn't going
to be driven into conduction to allow current through the Fuel Pump Relay's
coil.
Of course, without the ECA, your injectors won't get pulsed. You may have
spark, as a TFI ignition will work with just PIP and power. To verify that,
spray a fuel injector cleaner past the throttle plate and see if it kicks
while someone cranks it.  Don't go overboard with the stuff, you're not trying
to "run" off the stuff, just verifying you got power to the ignition
components.
Unfortunately (this is a "damnit guys, give us a break" issue), while th EEC
Power Relay and the Fuel Pump relay are functionally identical, Ford put
different base keys on them, so you can't interchange them.
Anyhow, I hope it helps out a little better in figuring out what to look for,
particularly since this is probably a "power" issue.