I have gotten a problem with my fuel gauge. Even when the tank is full, it shows 2 bars below half full. The problem came after changing fuel pump, so probably something I've messed up during that operation... Did I break something, or is it something I can do to fix it?

 

Remove the fuel pump check to make sure the float was puttin in the proper position and is not hitting something... it actually happens quite a bit of people but their new fuel pumps in