easy way is to drill a 1/16 hole in the middle of your gas cap
The 'vent valve' is a breather... it has no moving parts... they're typically placed at the top of the fuel tank.
inside the fuel tank
Remove fuel tank, replace pump from top of tank, re-install. Change the fuel filter while your at it!
in most(all)vheicles gas tank breather runs side to side with fuel tank hose(where you put the gas nozzle when filling up ) look for a small hole under the area where the gas nuzzle goes usually that is the (gas thank breather)
you will need to drop the fuel tank and remove and install from the top of the fuel tank
Fuel Injected? Located in the fuel tank - usually have to remove tank for access
Remove fuel tank--access at top of tank Remove fuel tank--access at top of tank
You must remove the fuel tank.
Drop the fuel tank.
remove fuel tank.
it's a breather hole to let air in as fuel is used. without the hole the engine would stall or the fuel tank would collapse like a crushed beer can.
it is in the fuel tank it might be easier to lift the box that remove the fuel tank