Intake Manifold: Description and Operation

INTAKE-AIR SYSTEM [FS]
The intake-air system is composed of the following parts:
- The fresh-air duct channels fresh air to the air cleaner and is equipped with a resonance chamber to reduce induction noise.
- The air cleaner removes dust and particles to prevent engine contamination.
- The Mass Airflow (MAF) sensor measures the intake air volume.
- The air hose directs fresh air to the throttle body.
- The throttle body controls the overall quantity of air provided to the engine and is equipped with an Air Adjusting Screw (AAS) for the idle speed adjustment.
- The Idle Air Control (IAC) valve directs by-pass air to the throttle body to maintain the proper engine idle speed under various conditions. It is controlled by the Powertrain Control Module (PCM).
- The intake manifold distributes the fresh air into the each cylinder. It is equipped with the Variable Tumble Control System (VTCS) shutter valve for emission performance and fuel economy improvements. (California emission regulation applicable model only)





Structural View