1997 Plymouth Voyager Fuel Pressure

Hello,
We have been working on getting rid of the hesitation in my van when it is being driven. We have changed a number of things, and we checked the fuel pressure today and that brings up the question. The book says that the pressure should read at 49, and it is reading at 54. Is this ok, or should it read at 49 point blank. Since the pressure is higher than asked for, could this be causing the hesitation problem in fuel output. Also could this higher pressure being caused by a bad fuel pressure sensor or maybe the computer itself? We have changed the fuel filter, plugs, pcv valve, rotor, cap, wires, coil, and egr valve. It now seems to run fine, but I guess we are just concerned with the pressure being a bit high.
Thanks for your time.

Matt Wolf