Can u help I need the fuel pressure specs?

Can u help I need the fuel pressure specs for 02 dodge grand caravan sport 3.3 L flex fuel tested with gauge and it is @ 60 psi ( not sure if it is a high reading?) And very erratic (jittery) need info on what gauge readings are to be thru test procedure process. How do you test fuel pressure if it is in the gas tank as part of the fuel pump (that is what I was told is it's location) or just bite bullet and buy new pump