Fuel tank vent?

[hanly2]

The other day when I fueled up my car I had a large rush of air when removing the gas cap. Then I also had a hard time fueling the tank because it kept shutting the pump off. So I think it may not be venting properly. I checked to make sure it was not imploding and that seems fine. I want to check the valve but I want to make sure that I wont get soaked with gas taking it off. Also want to make sure this is it. IMG_20170723_170717.jpg Photo by hanly2 | Photobucket