I have a 71 ford 4500 backhoe that was running fine last year. This year, found the fuel tank empty so I needed to bleed the system. New fuel filter. Air compressor on the tank (gravity feed system) and I bled the lines to the injector pump with good fuel flow.
When I crank the engine, it wants to start, but doesn't quite make it (this is normal if no heat is applied, even in summer).
Looking at the thermostart, it glows hot when power is applied, but there is no fuel in the return line from the injectors (goes through a checkvalve component that vents back to tank).
I even tried using a funnel to supply fuel to the thermostart, but that didn't make any difference.
Realizing that the thermostart could be defective in the fuel flow portion, I ordered a new one which will be here in a few days. Regardless of if the thermostart is defective or not, I still don't have any fuel feeding it. When I crank the engine, I don't get any flow from the return line port (which I would think would be required to get reliable flow to the thermostart). There is gravity flow when not cranking, so I don't think it is an air bubble issue there, maybe it just needs more than idle speed to 'kick in'.
Any ideas what my problem could be?
When I crank the engine, it wants to start, but doesn't quite make it (this is normal if no heat is applied, even in summer).
Looking at the thermostart, it glows hot when power is applied, but there is no fuel in the return line from the injectors (goes through a checkvalve component that vents back to tank).
I even tried using a funnel to supply fuel to the thermostart, but that didn't make any difference.
Realizing that the thermostart could be defective in the fuel flow portion, I ordered a new one which will be here in a few days. Regardless of if the thermostart is defective or not, I still don't have any fuel feeding it. When I crank the engine, I don't get any flow from the return line port (which I would think would be required to get reliable flow to the thermostart). There is gravity flow when not cranking, so I don't think it is an air bubble issue there, maybe it just needs more than idle speed to 'kick in'.
Any ideas what my problem could be?