1984 Jeep CJ7 Fuel Injection

First question, is this a throttle body or ported injection system? When you turn the key to on, not start, the fuel pump should run for a few seconds to pressurize the fuel system. Crack the fuel line at the pressure regulator and see if you are getting fuel, being very careful, we don't want a fire. That would turn a simple fuel test into a bad day. if no fuel at "key on", check flow with "key crank". If no fuel at key crank, I'll need to know more closely what year system we're dealing with if possible. The ECM sends the signal to the pump relay which turns on the pump. Please advise.

For the first question it has a injection system. We have tested the fuel line pressure. The pressure is good before and after cranking the motor.

OK, next you need to check injector pulse on "key crank". If you have, or have access to, a set of "noid lights", these will plug into the injector connector and flash if you have injector pulse. Or, you can use a regular incandescent test light to accomplish the same thing. If you have a throttle body system, you should be able to see the fuel spray. If it's a ported system, you will need a light. Keep in mind, the injectors are feed 12 volts with key on. The ECM "grounds" the injector to make it fire.

No fuel is sprayed when you turn key on or any time while turning over but if you add a little fuel it will start up and the injectors will start working

Well, not knowing for sure what ECM system you have, I can only guess. It must be the ECM isn't processing the "cranking" signal to the injection circuit. The ignition module must be sendind the cranking signal to the ECM, or you wouldn't have spark either. The run circuit out of the ECM has to be OK, or you wouldn't get any fuel at all. I wopuld change ECMs.