Hi again, and thanks for the info.
Do you have noid lights to test for injector electrical pulse? It's pointing to something potentially electrical for the injectors, but test them to ensure they are working or not. I'm sure you have checked it, but here is the location of the injector fuse. It appears not to be ignition related because if does start with outside fuel, that rules that out as an issue.
It is also pointing to the fuel pump/filter/fuel pressure regulator. You say you tested the pressure, but did you watch it while cranking? "If" the injectors are firing, and volume is insufficient, the pressure will drop dramatically and likely not start. If that happens, pinch off the fuel return line and check again. Be careful as it may start doing that.
I'll twist some ears on my end.
Keep me updated. Glenn
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Friday, November 27th, 2020 AT 8:25 PM