Gas gauge not working? I think I fixed it.

Compressed air charge on a fuel tank can be extremely dangerous. If the tank was empty it would take some time to reach a dangerous p.s.i. but if the tank is nearly full you might pop it in a heatbeat. If I was going to try compressed air charge I would have to carefully monitor pressure applied while slowly charging probably just using the fuel senders outlet as a air inlet. At very low p.s.i. I would begin to tap around on the tank with a rubber mallet in effort to coax the bends.