1994 3.0l still had distributor and TFI spark system, yes, TFI module(ICM) sends a PIP(pulse) to computer to time fuel injectors with spark.
TFI doesn't need computer to run spark, but computer needs TFI pulse to run injectors.
Good read here on TFI system and checks you can do: Ford EEC-IV/TFI-IV Electronic Engine Control Troubleshooting
All fuel injection computers have a way for the driver to shut off fuel injectors.
This is there to "Clear a Flooded Engine"
The TPS(throttle position sensor) sends computer 1 volt when key is on and your foot is off the gas pedal, if you press the gas pedal to the floor the TPS sends computer 4.5 volts or higher.
If TPS sends computer 4.5volts and RPMs are 0(key on/engine off) the computer will turn off fuel injectors until TPS voltage is below 4.5v.
This allows the driver to crank the engine and clear it out if flooded.
BUT........if TPS(or it's wires) should short out and send 4.5volts all the time............no fuel injectors, so no start.
Unplug TPS and see if engine starts.
top wire on TPS should read 5volts
center wire, below 1v throttle closed, above 4.5v throttle wide open
lower wire is ground