Yes the fuel pump turns on

And my friend said that my computer might not be recognizing the new injectors how likely is that and how do you reset the computer if that is the case

I got a friend of mine to call plug in his obd2 computer and it just said 3&4 were stuck open and I’m not sure about the fuel pressure. I know I’m not getting fuel pressure because the Schrader valve wasn’t releasing anything but i don’t know what cause my fuel pressure to drop.

i just replaces my injectors because my old ones were stuck in the open position. It was running prior to changing them out for new ones but now i have the new ones in and the motor cranks but doesn’t turn over. Any suggestions