Injector woes

[XplicitR33]

Hopefully some one can help me here. 93 25det S1, R35 coils PRP harness, 740cc nismo injectors, running Elite 2500. Had an issue with cylinder 1 not firing. Coil checked out so went to injectors. Had 12v and could hear injector tick. Connected to nexus to see Injector output, but when i click that, the row for number 1 disappears. Pulled rail to see spray and sure enough, #1 wasn't firing. Swapped injector and still same. First thing was to clean common ground on head. Did that, now none of the injectors are firing...smh. Didn't touch anything else whatsoever. I see the pinout for ecu, but colors are different from what I have. Now I'm trying to figure out which way to go.

[hunt3rj2]

Did you set the injector settings correctly in NSP? Also, did you verify that the impedance of the injectors is correct for your settings?

Once you verified that are you getting ignition sync? Do all the sensors report sane values? Is the fuel pump turning on to pressurize the rail? Also, is the ECU reporting a commanded fuel pulse width? Is that pulse width reasonable for your injectors? Have you checked with Haltech to verify that you aren't on a weird buggy build of their firmware? Did you unplug all your injectors and coilpacks when doing firmware updates? Haltech is notorious for trashing injectors and coilpacks by leaving outputs floating during firmware updates.