Fuel Tank Puking, not the fuse

[pwarner]

I having the same problem filling the tank with a '99 996 as was reporting by a later model year owner. I can fill it, but every two-tenths of a gallon the auto stop goes off on the pump. The same fix didn't apply - I've checked the fuses, and none are blown (even put a meter on E-6 just to be sure). Any ideas? Could the vapor control solenoid referenced in that other discussion thread actually fail?

[Loren]

Have a look at TSB 5/99 2015 Fuel Tank Hose Modification -- dated 8-12-1999. It may pertain to your car too.

[vizcarra44]

I having the same problem filling the tank with a '99 996 as was reporting by a later model year owner. I can fill it, but every two-tenths of a gallon the auto stop goes off on the pump. The same fix didn't apply - I've checked the fuses, and none are blown (even put a meter on E-6 just to be sure). Any ideas? Could the vapor control solenoid referenced in that other discussion thread actually fail?

From my experience usually it is either the tank venting valve or the wiring is damaged by rats, this is usually chewed up under the battery on the harness going to the tank pressure sensor. But it also could be that Tsb on the fuel pump lines. I believe you have some checking to do. Good luck.

[pwarner]

The car is driven too frequently and garaged safely enough that I shouldn't have to worry about rodents. Another thread mentioned that a fuel tank flap (that could be causing my problem) is operated when you open the fuel fill cover. Is this accurate? Might I be looking at a faulty or sticky switch up at the fill cover?

[JeffCampbell]

The fuel vapour recovery valve (bleeder valve) located at the top of the filler neck may be part of the problem. I noticed that there is a manual way to open this valve while filling. On the right side of the filler opening you will notice a pair of parallel plastic pieces. The one closest to the filler neck can be depressed with a grounded screw driver (avoid sparks) to open the  bleeder valve. This allows the displaced gas and vapours caused by refuelling to be directed to the charcoal tank where they are stored to be burned later when the engine is running. 

 

Thought I should post this since I have been unable to find a reference to the manual operation anywhere else.