Gas dump on fill up

[bearskinrug]

Well I'm a new disco owner, just picked up a rust free '98 with about 86,000 miles and was pretty happy till I just filled the tank. I got to about 20 gallons and the filler started to make that sound like the tank was getting full and about to auto-stop but didn't, and gas started pouring out from under the truck, near the passenger side. I live about 2 blocks from the gas station, so I chanced it and drove home. The fuel gage took the whole 3-4 min to get to full.
There's no rust under this truck, its been a southwest truck for life. Anyone have any ideas? filler neck or some sort of hose to the tank, maybe?
Thanks for any help.

 

[TOM R]

Filler neck hose or vent, tank is plastic, if it was coming from the tank pull up rear carpet there is an access pannel in the floor

 

[AGH Sasquatch]

x2, just look at the neck. as for the gas gauge taking several minutes to get up, this is normal for a d1. d2's go right up...

 

[lugnut]

The vent hose to the top of tank 9 times out of 10 old and cracked and leaks full when close to full. You do have to low the tank to replace the hose. Cheers

 

[bearskinrug]

Fuel pump wasn't screwed into the tank. At least I didn't lose all $60 in gas I just put in it...

 

[bigcheif]

That gave you what,15 gallons of premium!

 

[TOM R]

Glad it was something simple, I have tank probs to be pita on my ael equipped d1