Air Injection System: Description

The air injection system is used to add secondary air to exhaust ports for further burning of hot exhaust gases. This reduces HC and CO levels. System consists of air pump with built-in relief valve, by-pass valve (Federal only), check valve, air injection manifold and air injection nozzles. California models are equipped with air switching valve, which operates in response to over-temperature control system, and a mixture control valve which is an afterburn protection device.