Century V6-181 3.0L (1983)
Air Injection Control Valve: Description and Operation
Injects air into the exhaust port and/or catalytic converter to heat the catalyst and oxygen sensor quickly during engine warm-up and reduce
hydrocarbon (HC) and carbon monoxide (CO) exhaust emissions during normal engine operation.
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When the ECM energizes the air control valve, air is allowed to flow to the air switching valve where it is directed air to the exhaust port.
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During warm engine operation--closed loop--the ECM deenergizes the air control valve causing the air switching valve to direct air to the
catalytic converter.
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If the air control valve detects a rapid increase in manifold vacuum--a deceleration condition--or the ECM detects a failure in the system--air is
diverted to the air cleaner or dumped to the atmosphere.