A positioning tool for moving an element in a flow path of a down hole system without actuating a pressure actuated device in the system. A selection circuit can select between the default configuration and the programmable configuration. The feedback circuit generates a current responsive to an output voltage at an output port of a power transfer network, charges a capacitance responsive to the generated current, and intermittently discharges the capacitance responsive to a control signal generated by the control circuit. An engine gas inlet is configured to direct gas into the at least one combustion chamber.