Variable Induction System

PURPOSE
The air intake plenum is controlled by a tuning valve (rotary solenoid device) which is electrically controlled by the Powertrain Control Module (PCM) based on RPM and Throttle Position Sensor (TPS) signal inputs, for accurate switching capability at optimum switching points to enable either a "split" or "single" plenum condition.

OPERATION
During the low and high end of the RPM range, the PCM de-energizes the valve and enables a "split" plenum condition that provides for peak torque along with increased peak horsepower.
During the mid RPM range, the PCM energizes the valve, thus enabling a "single" tuning plenum condition that provides for mid RPM range peak torque.