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Fuel System

Variable Intake Solenoid (VIS) Description and Operation

In this manual: Fuel System
General Information — 15Maintenance — 7Engine Mechanical System — 84Engine Electrical System — 49Emission Control System — 22Fuel System — 95Clutch System — 28Manual Transmission — 21Dual Clutch Transmission (DCT) System — 47Drive Shaft and Axle — 20Suspension System — 36Steering — 23Restraints — 39Brake System — 54Body (Interior and Exterior) — 209Body Electrical System — 254Heating, Ventilation, and Air Conditioning — 56
~1min read

Description

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 engine conditions (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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