The pump should give 40 psi at the fuel rail, so you are correct in thinking yours is possibly due for replacement.
However I would do some minor investigative work before going ahead. There should be a fuel filter downstream of the pump, is this dirty or blocked in any way? That could affect the pressure. It may also be worth checking that the tank itself has not built up particles around the pick up.
Apologies if your set up is different , my +8 has the pump in tank system , with the fuel filter on the bulkhead being a later car.
Assume yours is still Hotwire 14CUX injection?
