monitoring the revolutions per minute of a rig engine of a well servicing rig, the rig engine controlled by a control system with computer software for controlling the rig engine,

displaying on a display a value of the engine's revolutions per minute,

based on said value determining in real-time if a fault exists related to said rig engine, said determining done by an operator without accessing the computer software,

correlating said value with suggested remedial action to deal with said fault,

manually moving a joystick of a joystick apparatus which is in communication with the control system to increase the engine rig speed,

displaying and increase in engine rig speed on the display,

if, despite correct movement of the joystick, there is no increase in engine rig speed, determining that an engine operation fault is present and proceeding to the step of correlating said value with suggested remedial action,

correlating said displayed value with a suggested remedial action,

wherein an engine sensor monitors rig engine speed and produces a signal indicative of the speed in revolutions per minute, the engine sensor in communication with the control system via sensor wiring, the control system including a programmable logic controller, and the joystick in communication with the control system via joystick wiring, the method further comprising

the suggested remedial action comprising one of check engine sensor, check sensor wiring, check programmable logic controller, and check joystick, and check joystick wiring.