Variable Induction Control Valve: Description and Operation

The Manifold Tune Valve (2) opens a crossover passage internal to the intake manifold plenum. It is operated by a vacuum solenoid (1), and is controlled by the Powertrain Control Module.

The Powertrain Control Module controls the Manifold Tune Valve Solenoid. The Manifold Tune Valve optimizes acoustical tuning of the Intake System during wide open throttle operation throughout the RPM range to increase torque.