In this manual: Kia Sorento XM 2011-2023 Repair Manual
~1min read
The Variable Intake Solenoid (VIS) valve is installed on the intake manifold. The VIS valve controls the vacuum modulator, which actuates the valve in the intake manifold. The ECM opens or closes this valve depending on the engine condition (refer to the table below).
Engine Status
VIS Valve
Operation
Average Speed
Closed
Improves engine performance at low engine speeds by reducing intake interference between cylinders
Low/High Speed
Open
Minimizes intake resistance by shortening the intake manifold length and increasing the air inlet area
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