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Home >> Kia >> 2020 >> Optima EX Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Control System - 2.4L (Except HEV)) >> Variable Intake Solenoid (VIS) Valve >> Description And Operation >> Operation

Description And Operation: Operation

WARNING: This page is about a different variant/trim than selected.
Engine Condition VIS valve Operation
Medium speed OFF Increasing engine performance in low engine speed by reducing intake interference among cylinders
Low/High speed ON Minimizing intake resistance by shortening intake manifold length and increasing area of air entrance
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