Description And Operation: Description

Variable Intake manifold Solenoid (VIS) valve is installed on the intake manifold. The VIS valve controls the vacuum modulator which activates a valve in the intake manifold. The ECM opens or closes this valve according to engine condition (Refer to below table).

Fig 1: Variable Intake Manifold Solenoid (VIS) Valve

Courtesy of KIA MOTORS AMERICA, INC.