~~~~REPLACE THE FUEL PUMP~~~
They are not like the old ones that just quit working. They don't just 'go out'. They start to loose pressure and bit by bit as the pump heats up you loose power and it does not feel like a fuel pump problem.
Been there done that. 4 stops at repair shops to see why she was bogging down after an hour or so on the road.....5th stop at Ford Dealership? They threw a pressure testing unit on the fuel line, ten minutes later we were dropping the gas tank and replacing the fuel pump. Problem solved. Goes without saying you replace the filter at the same time!:B