we can't be out of gas...

[hockeydad4-22]

Ok, so we fixed the shackle, r and r'd the tank to replace all the cracked and leaking file fill and vent hoses and put it all back together but when the tank is half full, it no longer picks up. We are not pumping fuel.

I thas a 23 gal after market tank and I know there is 7 gallons in it now.

any ideas? I am stumped. When we pulled the tank everything looked good inside. Works fine when full, just dies when we reach half tank.

Thanks

[Moab Mike]

You might have the pick up line and the vent line backwards.

[hockeydad4-22]

You might have the pick up line and the vent line backwards.

No- pretty sure that is not it. Towed her to the gas station filled her up to the brim and got 3 blocks. I am thinking the mechanical pump failed. Going to tow it back to the shop tonight and tomorrow bypass the pump and install an electric pump.

Do I need a return line to the tank if I do that? There are fittings on the tank if I do, just not sure how to do that with the carb.

In the mean time if someone wants an easy spotting to post up, we are mere 50 feet past a closed advance auto on south broadway... Waiting for daniel and the ranger to tow us....

Looks like a late night.

Got to love a vehicle that strands you like this...

[Viperwolf1]

You don't need a return. Mount the pump as close to the tank and as low as you can. That will make it easier for the pump to work and will pressurize most of the fuel line minimizing vapor lock tendancies.

[Shawns Fords]

sometimes a line can get a crack in it and will suck air when the pump is running. I had this happen to me more than once and it turned out to just be a short section of rubber fuel line was worn out and ruptured.

[ClayJ]

Some simple things.

Disconnect hose at the carb, extend with more hose, then put the end into a big glass jar. Crank the engine a few times to see if gas is coming through. Let it sit for a while and see if it has water in it.

If you have a vacuum/pressure gauge, attach that and crank a bit to see what sort of fuel pressure you are getting.