Injectors not firing

Oh ya, it's not that I long winded. I believe what would be very helpful is if someone knows how to use the software forscal using a laptop. I have that but I have no idea how to use this software. Probably can be very helpful if not no harm it it an idea I have this software.

Used a volt tester came up with 3 volts on each injector driver side 2v on passenger side. I tested at plug where it connects to the injectors. I tried testing in the plug that clips into the gasket only reading I could get was the glow plus which was 12 v until the timer turns off then zero. I made a pin that would slide into the 6 or 7 holes in the plug that connects to the gasket. Is there a relay fuse that may have gone bad?

Yes, starts up easily sounds like bad injectors. I went to Williams diesel in Ocala they told me to replace injectors. So I have the truck sounds the same runs great, but sounds terrible. Like I said I checked today and I have 2 or 3 v on each injector 0 v on number 2. Possible relay bad?

When I unplugged number 2 there is no change. When I unplugged the others one by one the engine drops power very noticeable. I used a volt meter and it's reading was 2 or 3 on all. But number two I can only find the instructions how to use a volt meter that you sent me. So I'm lost electrical is not my thing beware.