This system, found on the LS1 engine, replaces a traditional mechanically linked throttle with an electronic one. A sensor on the accelerator pedal sends a signal to the engine control module (ECM). The ECM then actuates an electric motor, which opens and closes the throttle plate, regulating airflow into the engine. This setup differs significantly from older cable-operated systems.
Electronic throttle control allows for more precise airflow management, contributing to improved fuel efficiency, optimized engine performance, and enhanced integration with other electronic systems such as traction control and cruise control. Its introduction on the LS1 engine marked a significant advancement in automotive technology, paving the way for more sophisticated engine management strategies and emissions control. This technology provides a foundation for modern features like electronic stability control and adaptive cruise control, which rely heavily on precise throttle control.