Well, I called my dealer and spoke to the service department. I was told that there is a small, circular, relief screen at the 11o'clock position when you look at the fill. He told me to blow compressed air into it because it may have become blocked and that will definitely cause the gurgling and spitting because air cannot escape. Compressed air will apparently blow the blockage, probably a small amount of water, back into the tank. Well I checked that screen and it's blocked alright....it's not even hooked up to the tank. There's no tube connected to the back of it, instead it has a hard plastic plug attached to it. I have a 2014 Whitehawk 33bhbs, does anybody else have a gravity fill without this relief valve connected? The attached picture shows the rear of the fill and you can see the unattached relief in the 1 o'clock position.
2014 Whitehawk 33bhbs
2014 F-250 Superduty Crew Cab 6.2l Gas 3.73