My 72 f100 acts like it runs out of gas, particularly on an uphill street. After a few moments it will start up and run fine until the next time. Doesn't seem to matter if the tank is full or not.

I know this is an old thread, but my `70 F250 does the same thing. If cruising at high speeds for too long, the motor will start coughing, then die. Checking the carb- there's nothing coming from the squirters. If I keep cranking the motor, it'll start after the bowl gets filled again. Runs fine at lower speeds until I get it on the highway, or rev it out in 2nd gear. I checked the tank and found a round cardboard gasket from a bottle of fuel additive at the bottom of the tank next to the fuel pickup line. I'm assuming it was getting pulled up against the tube when the motor needed as much fuel as it could get.

Replace fuel pump still cut off

We just had the same indications, starts and would run fine for a while then all of sudden no more fuel coming out of the new installed gas pump, this truck has the auxiliary mounted gas tank so lots of extra fuel lines down there, after an exhaustive and intense hot afternoon stuck on the side of the road, had to get the truck towed, a 1972 F100. Very frustrating because the engine runs like a top but if no fuel, then nothing !!! We believe the gas tank needs to be cleaned out properly and then it will work.

If my tank has 15 gallons in it it has more trouble . If I keep it 1/2 full it’s better. Also the gas cap should be vented. If it’s a very hot day expansion in the tank can cause pressure build up and probably a vacuum.

By a new truck and be done with it

I put a new accelerator pump on mine for $5 and it works fine now... they make three different ones for the Ford so make sure that you get the right one... Four screws simple fix, make sure you put the spring back in the correct way!