Devn

Sorry if this is the wrong place for this question. But I'm having an issue with filling my gas tank when I get to half a tank the gas pump will shut off and if I keep trying to fill it it shoots out of the filler neck which is annoying and embarrassing but very funny to your buddies in the car.
Anyway I crawled under the car and removed the vent valve and I was able to suck air and blow air through it. I also tried getting gas with it off and the problem persisted. I also made sure the gauge is working correctly by unplugging the sending unit and the gauge read empty then used a paperclip to see if the gauge read full which it did. Also If I let the gauge hit empty it is definitely empty learned that one quick.
Forgot to say it a 87 305 TPI Firebird
I can't really tell if it's a pressure problem it could be. Occasionally when I take the filler cap off I can hear pressure releasing but it's not often that it does that. If anyone has any pointers please let me know.

Fred SS

iTrader: (3)

I have heard of that problem with aftermarket fuel tanks. The only solution I have read is to fill the tank very slowly, just barely depressing the fuel nozzle trigger.

Good luck,
Fred

StevenK

iTrader: (1)

is the vent line clear and moving air?

RBob

iTrader: (1)

Anther item to check, is to see if the filler neck has been cut. Then patched with a piece of hose. Many of these tanks have a channel to allow air out of the tank, while fuel pours in. This is done via a piece of sheet metal mounted in the neck, like a two-tired bridge.

Open up the bridge between the tiers and all heck breaks loose.

RBob.