Intake Manifold Tuning (IMT) System

Engine power is optimized by closing and opening the intake manifold tuning (IMT) valve. When the valve is closed, there is high torque at low engine speed. When the valve is open, there is high torque at high engine speed.

Fig 1: Identifying Intake Manifold Tuning (IMT) System

Courtesy of AMERICAN HONDA MOTOR CO., INC.