An injection molding system for initiating flow of fluid material into multiple gates of a mold cavity during an injection molding cycle, the system comprising: a first selected valve comprising a first fluid flow passage having a first gate to the cavity, a first valve pin driven reciprocally along an axial upstream downstream path of travel through the first flow passage by a first actuator between gate open and gate closed positions, one or more downstream valves (711a, 711b, 711c), each downstream valve comprising a downstream fluid flow passage having a downstream gate to the cavity disposed downstream of the first gate, a downstream valve pin (7112a, 7112b, 7112c) driven reciprocally along an axial upstream downstream path of travel through the downstream fluid flow passage (7115a, 7115b, 7115c) by a downstream actuator (730a, 730b, 730c) between a gate open and a gate closed position, a controller receiving a first signal (708, 795b), indicative of a start of a position of a barrel screw that feeds the fluid material to the injection molding system, the controller including a set of instructions that instruct the actuator (730a, 730b, 730c) of the valve associated with the at least one selected downstream gate (785a, 785b, 785c) to open the gate on a first injection cycle by withdrawing the valve pin (7112a, 7112b, 7112c) from the gate closed position upon arrival of the barrel screw at a predetermined open gate screw position (OGSP) occurring at an open gate screw position time (OGSPT), wherein the valve associated with the at least one selected downstream gate further includes a position sensor that detects an actual open gate time upon withdrawal of the valve pin from the at least one selected downstream gate (785a, 785b, 785c), the position sensor sending a signal indicative of the actual open gate time to the controller, the controller receiving the signal from the position sensor and including a set of instructions that automatically determines an adjusted open gate screw position (OGSP') for use on a subsequent injection cycle, the instructions that automatically determines comprising automatically determining the adjusted screw position (OGSP') to be a position on a subsequent injection cycle that accounts for any delay in time on the first injection cycle between the open gate screw position time (OGSPT) and the actual open gate time. a first selected valve comprising a first fluid flow passage having a first gate to the cavity, a first valve pin driven reciprocally along an axial upstream downstream path of travel through the first flow passage by a first actuator between gate open and gate closed positions, one or more downstream valves (711a, 711b, 711c), each downstream valve comprising a downstream fluid flow passage having a downstream gate to the cavity disposed downstream of the first gate, a downstream valve pin (7112a, 7112b, 7112c) driven reciprocally along an axial upstream downstream path of travel through the downstream fluid flow passage (7115a, 7115b, 7115c) by a downstream actuator (730a, 730b, 730c) between a gate open and a gate closed position, a controller receiving a first signal (708, 795b), indicative of a start of a position of a barrel screw that feeds the fluid material to the injection molding system, the controller including a set of instructions that instruct the actuator (730a, 730b, 730c) of the valve associated with the at least one selected downstream gate (785a, 785b, 785c) to open the gate on a first injection cycle by withdrawing the valve pin (7112a, 7112b, 7112c) from the gate closed position upon arrival of the barrel screw at a predetermined open gate screw position (OGSP) occurring at an open gate screw position time (OGSPT), wherein the valve associated with the at least one selected downstream gate further includes a position sensor that detects an actual open gate time upon withdrawal of the valve pin from the at least one selected downstream gate (785a, 785b, 785c), the position sensor sending a signal indicative of the actual open gate time to the controller, the controller receiving the signal from the position sensor and including a set of instructions that automatically determines an adjusted open gate screw position (OGSP') for use on a subsequent injection cycle, the instructions that automatically determines comprising automatically determining the adjusted screw position (OGSP') to be a position on a subsequent injection cycle that accounts for any delay in time on the first injection cycle between the open gate screw position time (OGSPT) and the actual open gate time.