Abstract: An injector is provided which includes a nozzle valve element, a control volume, and an injection control valve including a control valve member for controlling fuel flow from the control volume so as to control nozzle valve movement. Importantly, the injector includes a nozzle valve lift detecting device for detecting nozzle valve lift and providing a nozzle valve element lift feedback signal. Feedback signals are improved and control valve member oscillations are minimized by positioning a valve seat associated with the control valve member a spaced distance from the control volume, positioning a drain orifice such that the nozzle valve element restricts flow through a drain circuit when in an open position and extending the control valve member from the valve seat to the control volume to form an end wall of the control volume.