Interesting. So last summer I changed the gasket on the sending unit because I had a small leak when tank was over 1/2 full. I camera’d the inside of the tank and was sure the vent tubes were hooked up backwards. I must have saw a diagram somewhere which made me think the gas was leaking from the short tube because it was hooked up backwards. Maybe I just switch them back and see what happens.

Anyone have a diagram on what vents get hooked to which tubes inside the tank. Just looked online and can’t find one... makes me wonder what I saw that made me think it was backwards to begin with