I'd guess that whoever installed the new fuel pump forgot to tighten the hoses, or poaaibly he forgot to install the vent hose all together. I sold an 01 Focus to buy my Jeep and the day before the guy picked it up the pump went bad so I had the dealership put a new one in. They forgot to attache the filler hose completely so when the guy was filling up on his way home it poured straight onto the ground. I was glad that I told him about having the pump changed or he'd have been REALLY upset with me. As it was the dealership towed him into the shop where they fixed it and paid for his gas.