Air Induction System

AIR INDUCTION

All engines are equipped with:

Replaceable dry-type Air Cleaner Element (ACL).

MAF sensor.

Upper intake manifold with integral Intake Manifold Runner Control (IMRC).

The air induction system supplies clean air to the throttle body. it operates as follows:

Outside air enters from the air cleaner intake resonator through an opening in the front fender and then moves into the ACL.

Once in the engine air cleaner, air is filtered through the ACL element.

The filtered air travels through the MAF sensor to the air cleaner outlet tube, engine intake air resonators (if equipped) and into the throttle body.

The IMRC assemblies provide two air passages for each cylinder. One air passage is always available to direct throttle input and the other passage switches from closed to open by means of a valve plate, the IMRC actuator and cables.

Below 2800 rpm, this valve plate is closed to improve low speed and cold engine performance.

Above 3500 rpm, this valve plate opens to improve high speed engine performance.

The Positive Crankcase Ventilation (PCV) system is also supplied clean air through a fitting on the air cleaner outlet tube.

AIR INDUCTION NOISE

Air induction noise is effectively eliminated by means of the following:

The air cleaner intake resonator

A sealed and tuned resonance chamber created by the engine air cleaner

An engine intake air resonator, located between the engine air cleaner and the throttle body.