2nd Gen Non-Engine/Transmission Fuel tank won't take but .5 gal.

[stumphumper]

After 230k miles the gas gage is not telling me the true level of fuel. After reading a lot of posts I now feel very lucky! Well I dropped the tank and installed a capaitive type sender but could not get that to work. bought a new float, made repairs to the metal cover (it was found floating about in the tank), and put it all back under the truck. Now I can only put about 1/2 gal of diesel in and the filler tube is overflowing. I will go back under tomorrow and try to pop the flip-over valve off and check it out and plan to try and blow some air back through the small vent pipe at the fill neck. BUT HERE IS MY QUESTION: I saw a green plastic ball with what looked like three springs attached to it at the end of the filler tube when I was replacing the tanks filler hose back up. I look at a lot of fuel posts and cannot find out what that is! Is it also a check valve for roll-over protection... could that be stuck and stopping fuel from entering the tank??

 

[MLee]

You just answered your own question. Looks like it might be jammed closed. You might try the compressed air at low/medium pressure or try knocking in that area with a bat/handle of some sort. Try a rubber hose stuck down in the filler and see if it drops.

 

[Cummins12V98]

Ditch the ball!

 

[stumphumper]

It was the flipover vl/vent. I dropped the tank again and when i started to unscrew the sending unit fuel gushed out the fill and vent pipes.(tank was tilted) What a mess!