What causes OBD1 code #26 "injectors 1,2,3 peak current not reached"?

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1989 Dakota Sport V6, manual trans. 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. 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 codes were #12, #26, and #55. Does this mean the two throttle body injectors are bad? I appreciate your assistance with this no start issue! Thank You!