This was exactly my issue, thanks! This saved me a dealer visit, stress and $$$. All I had to do was blast a little air into the lower drain hole while plugging the upper vent hole with a finger. Water immediately drained out the line. Prior to that I could see standing water inside the vent hole, indicating there was water in the drain system. I had the same symptoms - liquid shooting out the upper vent hole, which I never even knew existed until it announced itself wetly. I couldn't see much at the gas station at night so went home with barely any gas. I'd let the tank get lower than normal - maybe 80 miles range. We just had the first storm of the season so some crud probably plugged the drain hose. Thank goodness for your answer and Google search.
