'74 1.8L LJet/fuel pump, Fuel Pump not staying on Options

[RKramden]

This is my first time starting a topic, I don't know if I am even typing in the correct location, but I am having an issue with my '74 LJet and fuel pump. The pump starts with the ignition switch, Pump also runs when Air sensor arm is manually moved. However when starting, it seems that the air sensor is somehow cutting off the fuel pump circuit. The PO had bent the arm so it never opened, but I have bent it back to move as designed. If I disconnect the electrical plug to the Air Sensor, the car starts and runs fine......any thoughts? BTW I have replaced the dual relay, but that did not fix the problem.

[RKramden]

Thanks All!!
So I checked the Vac lines, all to the right spot and all new
Large intake rubber hose taped up temp for now. New one coming
Unplugged AFM or Air Flow Sensor (they seem to be used synonymously) and the engine will start and idle. The flapper moves freely and the pump contact closes when engine starts.
If I give it gas it will quit. Seems logical as the ECU is looking for an air signal, assume it will idle without one.
If I plug it in, it quits. My feeble mind thinks that maybe the fuel pump has been hotwired to bypass the AFM/Dual relay signal and somehow sending that signal is grounding out the fuel pump. As previously noted the PO had bent the arm in the AFM so that it would never make contact (I have bent it back to norm).
I will try to trace the fuel power this evening.
Could someone confirm that the ECU is out of the picture as far as fuel pump power goes? In the line diagrams I have seen, it looks like pump power is either Ignition switch to Dual Relay to pump, or AFM pump relay to dual relay to pump. Input #20 to the ECU looks to be monitoring the pump relay, but I am not sure what it is doing with that input.
thanks again.