Lol, thanks Stan!
Derek's comments are helpful. I probably need to start with checking to make sure the valves are working properly and then try your option from there.
I hear the valves get stuck and that could be what is going on also. I only have 95K miles on this rig, so it is not like 195K where maybe this thing needs to be replaced from use.
I usually only have the issue in the summer heat. Had it a little in the Maze, when it was warmer at the end of the day.. And I did not have a full tank most of that time.