CIS Air Flow

Metered airflow through the system

The primary air flow in the CIS is through the air filter area (1), past the Air flow Sensor plate (2), through the connector boot to the throttle body and past the throttle plate (6). The cold start valve at (7) injects into the intake manifold below the throttle body. From there it is distributed through the metal intake runners (8)where it mingles with fuel from the injectors.

Engine airflow

The fuel injectors (9) are positioned just above the intake valves and are continually injecting a fine spray. The closed valve allows the mist to collect until the valve opens, ingesting the cloud into the combustion chamber.