1994 Plymouth Voyager 1994 Plymouth Voyager will not start.

This Voyager simply was parked one night and would not start the next morning. If you pump the gas the motor will run, but will not get above 450 rpm and as soon as you stop pumping, the engine shuts off. Compression test yielded good results (150 to 155 on all cylinders) Battery tested good. Ignition was tested with a calibrated tester and a solid, continuous spark was the result. Fuel pressure tested at 48 psi at the port on the fuel rail. The fuel injectors, however, seem very quiet when I listen to them with a stethoscope. They do click, but very faintly. Checking the voltage at the wiring harness, they only seem to be getting about.5 volts. Though I can't find the specific voltage requirements for the injectors, I am guessing it's well above.5. So, if that is the case, what would be causing the interruption of power to the injectors? And what voltage should I be looking for?