A spring-actuator assembly (10) is provided for a fuel pressure regulator. The assembly includes a housing (30) and a washer spring (10) received in the housing. The washer spring has a body (12) with a top surface (13) and a bottom surface (15). The body includes an opening (14) there-through and a plurality of pleats (16, 16′) therein so that that first faces (20) of the top surface are disposed on a plane that is different from a plane of second faces (22) of the top surface. At least certain first faces define contact points (24). The assembly also includes an actuating member (26) disposed at least partially in the opening and engaging the contact points of the certain first faces such that a fluid flow passage (36) are defined between the washer spring and the actuating ball for dampening.