My charcoal canister was fine afterwards.
Luckily I heard that howling from the fuel cap releasing pressure, pulled over and slowly relieved the pressure. 2nd time over in the Grand Canyon area I did the same and then added more fuel and it was fine.
Luckily I heard that howling from the fuel cap releasing pressure, pulled over and slowly relieved the pressure. 2nd time over in the Grand Canyon area I did the same and then added more fuel and it was fine.