An electronic engine controller utilizes a controller network interface for direct communication between an electronic engine control unit associated with an engine and the controller to monitor and control the engine. The controller uses a microprocessor and custom programmable software to monitor and determine operational parameters as well as institute and send electronic commands to the electronic control unit in a pre-determined response operational framework. The controller monitors certain engine operational parameters when enabled. If the engine remains in an unloaded condition for an extended period of time, the controller automatically throttles the engine down to idle condition to save fuel. It does this by issuing commands to the electronic control unit which controls operational functions or parameters of the engine. The engine parameters and idle time are configurable, allowing the setup to be optimized for a particular method of operation, regardless of the specific application.