Air Injection: Description

An exhaust port air injection system is used to reduce hydrocarbon and carbon monoxide emissions on many emission controlled vehicles. System adds a controlled amount of air to exhaust gases in exhaust ports, causing oxidization of gases. Air injection system consists of a belt driven air pump, connecting hoses, check valve(s) to protect system from hot gases and injection tubes. In addition, most 1966-67 models incorporate an anti-backfire valve while 1968-74 models use a by-pass valve or a combination diverter-pressure relief valve assembly.