Leaking fuel at evaporative canister

I believe that she said there was pressure coming out of the tank. I think the boys mentioned the canister. She was not specific about exactly where the fuel was leaking. I think the clue was in the exhaust being replaced and her moving to New Orleans. If the exhaust is missing heat shields or was routed too close to the gas tank, the gas in the tank will expand and pressurize the tank. The fuel will leak out the weakest link. Also this condition would be much worse in the warm weather of New Orleans.