Originally Posted by
GraphiteGhost
.
Only thing I can suggest (since I have not heard of this before) is to remove and replace the charcoal canister and find the reason fuel is feeding into it. That system should never have fuel in it so IF you never 'topped off' the fuel and overfilled the fuel tank, there is something that failed in the system allowing fuel to return or being sent down the 'vent' line. I know, it sounds obvious, and what I say here sounds overly simplistic, but there is no other way for this to happen given the information presented. Good luck in fixing this issue!
.
There is an overfill valve at the bottom of the fill tube, this causes the gas pump to shut off when this valve rises and closes the fill tube.
If it was jammed open who knows how much you could overfill the tank.
If it was jammed shut you would not be able too put much, if any, fuel into the tank
The OP says he cannot add fuel to the tank.
This gas filled charcoal filter has occurred before but I cannot find the thread.