No fuel from dual port TBI injectors, no start.

No fuel from injectors, have spark to plugs, Truck has old fuel in the tank from sitting for 10 years so I rigged a container with new fuel pump and fresh gas straight to throttle body, and direct off battery. Also replaced the fuel pressure regulator because I did a pressure test with a make shift gauge setup, squeezed the return line, and the pressure went up. I don't hear the old fuel pump still in the tank running, just the new one running continuously. Engine cranks fine and starts when primed. The three obd1 codes were #12, #26, and #55. Cleaned ecm terminal connectors and # 26 went away after battery disconnect. Tested injector circuit at connector on the side of TB with a Bosch PFI noid light and both inj circuits flash a yellow color. I checked the resistance of both injectors and they were 2 ohms. Is the resistance value OK? Since the pump runs continuously, should I suspect a blown seal in the TB, or the new pressure regulator is bad, or maybe plugged injectors? Had the injectors removed and the outside looked clean. I appreciate your assistance with this no start issue! Thank You!