Gas overflows when I fill up

Dave

New Member
Joined
Oct 10, 2019
Messages
8
Location
Longview, Wa
I have had suggestions, but so far they did not apply to my 2010 Rubicon. There is this thing inside behind the driver's side tail light that is about the size of a soup can. Does anyone know what this is? Some kind of an air valve, and could this be the problem with my overflowing?