air injection reaction system

(AIR system) The AIR system helps to reduce hydrocarbons and carbon monoxide levels in the exhaust by injecting air into the exhaust ports of each cylinder during cold engine operation, or directly into the catalytic converter during normal operation. It also helps the catalytic converter to reach proper operating temperature quickly during warm-up. If a GM cars has an air pump, the system is an AIR otherwise it is a PULSAIR system.

Dictionary of automotive terms. 2015.

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