I have a 2008 mazda 6 2.3L 4-cylinder and I have changed my fuel pump but I'm still having a couple issues. Major issue is when I take just about any turn after my fuel tank is around a half tank or less, it feels like for a brief few moments that I'm getting absolutely no fuel and it wants to take a moment to accelerate. Then if I fill my tank completely up, I will lose a good portion of the fuel from underneath my car. It's enough to see a fuel leak mark when I pull away. What's wrong? Please help me.