An injection molding system (10) and method of use, where the system (10) comprises an injection molding machine (40), a controller (16) for controlling pack or fill pressures of an injection fluid (1153) injected during the pack and fill phases and a recorder, whereas the controller (16) includes instructions that control drive of actuators (1a, 2a, 3a, 4a) to effect an increase or decrease in fill and pack pressures of the injection fluid.