87 924s fuel injector pulse.

[ggrecian]

What all components/sensors send info to the dme to tell injectors to pulse? DME bench tested "good " at ECU doctors. I have been chasing a crank no start for 3 mos. I have spark. I have tach bounce. I have 36 psi to the fuel rail at crank. I also have voltage to each fuel injector connection. However, injectors not firings. I have installed brand new fuel injectors. Please Help! Also how many volts should reach the injectors with the ignition switch turned on? I am receiving a few volts to each of the two wires connecting to fuel injectors.is this correct? I have read i should receive 12 volts to one side? Is this accurate?