Well, you have done the work, it's either
the injector is plugged, or a bad connection
to the injector, fuel PSI should be 36 so over
30 is enough to run at idle at least, check the
screen and make sure you don't have a broken
wire feeding the injector.
BTW, What is the Ohm reading of the injector coil
Over 10 Ohms you can hit the injector with straight 12V
from the battery as a test of the injectors integrity, if
that works, find the bad wire or another ECU
P.S. even a low Ohm injector can take a 1 Second hit of 12V
just don't do it too much, coil will get hot and burn out.
Good Luck,
Wild