I have good pressure to injection pump but no fuel to injectors, will run on what I pour in intake then die. Any ideas, air in injection lines? bad injection pump>? I have 2 trucks doing this same thing......

Check if the fuel shutoff solenoid is working --- it should click when you apply 12V to it.

It works fine, checked that already. These are old military trucks that have sat for a couple years.

Ok what happens if you remove the return line from the IP and crank it over. Do you get fuel coming out? If not you have to prime the system.