Cordia Turbo hesitates at 80-90mph (120km/h)

My Cordia moves great till about 80-90mph, It then starts to hesitate. (Feels like its starving for fuel.) I've had the car up to 130mph with no problems before. Ive replaced the fuel filter, cleaned the filter thats in the tank. I then replaced my injector plugs because they were not in the best of shape.(Old and cracked.) I had a leak in one of the injectors, so I replaced both injector o-rings, but still hesitates. I gave the car a tune up about 3 months ago, new plugs, plug wires, cap and rotor ect. What else should I check into?
Thanks
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fuel pump may be??

I took the filter out of the tank again and cleaned it REAL good and took it out for a spin, I was able to get her up to 110mph with no problems. I might have fixed the problem.