Need help with a fuel problem on my 1980 Ford F250.?

Question

I replaced the fuel pump and the fuel filter. Ran fine for about 2 days and now doent seem to be getting a fuel. Will start if you put fuel in the carb but no fuel is getting to the carb from the lines. Truck has duel tanks, but I only use the front tank as the switch has been disingaged. Please help with any ideas

Answer 1

I have seen those dual tank valves mess up. And you can still hear the pump running? I think that truck has a fuel cut off just ahead of the front seat passengers left foot make sure it's button is pushed in from above you can hit it with a screwdriver or something thrown in on the floor can bounce up and turn off the fuel system.

Answer 2

It sounds like the diaphram in the new mechanical pump went south. It is less likely that anything else is wrong.

I've seen bugs and all kinds of stuff in fuel filters that made it's way through the gas tank and fuel pump to the filter and that didn't stop the gas from getting into the carburetor. This can only happen if the screen on the pick up tube in the tank is missing or torn.

Make sure that you recheck your installation and that there is gas in the tank you are sucking fuel from. If there was a "leak" somewhere along the line it'll suck air rather than fuel.

Good Luck!

Probably some made in China part, anyway.

Answer 3

1980 Ford F250

Answer 4

I would start by checking the fuel line filter, then for a blocked line. If that didn't resolve the problem I would check the fuel pump. This seems like a strange problem to be having, might be something deeper. Are the tanks rusted at all? I would put my money on a blocked line or clogged filter.

Answer 5

1980 F250

Answer 6

I am not sure of this fuel pump as I am in New Zealand. But it may not have been the fuel pump . The old one may be OK. So I always when fitting a new ump connected the tank hose and manually worked the pump if this model can be manually operated by pushing the lever. Then you can see if it will suck the fuel from the tank. If it will not do it manually then their is some thing wrong from the pump to the tank. You can test a pump manually by hand by pumping some fuel out of a tin with your pump to test it and that you know that you can do it. It is not easy to diagnose from a distance with out see the vehicle. But I do not think their is much wrong. If you had a compressor you could blow air into the tank by just blocking the filler cap hole with a rag around the air hose. It does not have to be completely air tight as you do not want to blow our the tank . Just enough to push the fuel through. And blow the line back from the carb y connection to the tank. But from cap to motor is better, or do that last so you have fuel completely up the line to the carby with no air bubble then.. If you can with the fuel pump manually do it then you should be able to work out what is wrong. As your old pump may well still do this to prove it. Good luck.

Answer 7

check to see if you have a black canister near your fuel tank. fuel lines going into . It is for reverse flow i think. I had a poppet in one of them go bad and it prevent fuel from leaving the tank. Disconnect the line and see if gas flows out (gravity) . try bypassing it you have one installed. If i can recall it was part of the filter assembly. This was a 1980`s ford vehicle and it was along time ago sorry can`t give you more input

Answer 8

Check the fuel cut-off switch under the dashboard beside the right side kick panel. Pull back the carpet and it will be right there. Chances are it needs to be reset. Just hold in the red button for 20 seconds, and it will reset.

Answer 9

Try it with the fuel caps off. I'll bet you've got a vacuum lock.