Variable Induction System

Each intake manifold cylinder runner is divided into 2 parts. Intake air control valve is installed in one passage on each cylinder runner. Opening and closing of intake air control valve provides best possible airflow to prevent low-speed performance loss and improved fuel economy.

The Engine Control Module (ECM) uses engine RPM input signal from distributor pick-up coil, throttle position signal and engine coolant temperature input signal for determining intake air control valve operation. The ECM controls ground circuit on T-VIS Vacuum Switching Valve (VSV), which provides vacuum to a vacuum chamber for intake air control valve operation.