With a car the air rushes out right? This was the opposite. It was difficult trying to open the fuel cap as it was being held by vacuum. When you give it a tug you hear air rushing in.dayeve said:Do you mean you get a sound like when you open the petrol tank on a car?
Engrish muchly?Cjay said:Zafar was right upon opening the fuel cap. It might be able to make sure that the vacuum was inside of the tank. And then, try to have air rushes that could be out.