Variable Induction Control Valve: Description and Operation
MANIFOLD TUNING VALVEFig. 17 Manifold Tuning Valve:
The valve connects both passages of the intake manifold plenum (Fig. 17). It is an electric motor.
The PCM controls the MTV solenoid. The manifold tuning valve optimizes acoustical tuning of the intake system during wide open throttle operation throughout the RPM range.