My car has a weird hesitation everytime I drop below half a tank of gas. I recently replaced my fuel pump, and that is when the problem started. The car runs great on a full tank, but right around 8 and a half gallons used, I start to get a big stutter during acceleration. It feels like the car is running out of gas. I fill it up(always 8.5 gallons) and the car runs fine again. Any Ideas what my problem might be. Am I having a problem getting gas out of the tank?
Thanks in advance

 

did you change ur fuel filter too? I PM'd you btw