Secondary Air Injection (AIR) System
WARNING: This page is about a different car, the 1995 Ford Pickup, 1995 Ford F-Super Duty, and 1995 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Individual systems may vary in number and types of components, depending upon engine size and application, but all systems use the same basic components. A typical system consists of an air supply pump, air by-pass valve, air diverter valve, check valve(s), air manifold and air hoses.
In the AIR system, air can be by-passed to the atmosphere by a secondary Air By-Pass (AIRB) valve and/or directed to exhaust manifold or catalytic converter by a secondary Air Injection Diverter (AIRD) valve. Some models may use a combined AIRB/AIRD valve.