Good morning everyone. Starting my experience with volvo with an XC90 3.2 2009. I bought the car not working, and from the beginning thought it would be the fuel pump. And it really was. We installed the new pump, and the car started perfectly. But I put only 20 liters of fuel to start the car. It worked for 30 minutes and I turned off the car. I started again, but it didn't start, so I put another 20 liters and it did normally. I saw that the tank is divided into two parts.

Do you need to fill one side first, that is, fill the tank for the rooster to pass to the other side? did I make a mistake or is that so? because looking at the tank picture it has two compartments ... does anyone know anything about this?