Variable Induction Control Valve: Description and Operation

Intake Tuning Valve:

DESCRIPTION
The tuning valve (rotary solenoid device) is electrically controlled by the Powertrain Control Module (PCM) based on RPM and Throttle Position (TP) 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 creates 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 creating a "single" tuning plenum condition that provides for mid RPM range peak torque.