Pictures are far better than words.
Have check all the tubes and no kinks. Everything seems in order. Would a faulty roll over cause the pressure/vacuum? I'm not sure which it is, as I've not been spat in the face with fuel, although I could smell fuel the other day, so I'm guessing it's positive pressure trying to escape.
https://www.tm-img.com/image/xAUFshttps://www.tm-img.com/image/xA6HUhttps://www.tm-img.com/image/xA5v1
