Air Suction System: Description

The Air Suction system uses exhaust gas pulses to draw air into the exhaust manifold which helps to complete oxidation of emissions. This system includes an air suction (AS) valve (2 on Tercel), an air intake filter (2 on Tercel), various hoses and a restrictor (Tercel only). Federal Pickups also use a vacuum control valve (VCV), vacuum switching valve (VSV), air switching valve (ASV), check valve, thermal switch, catalytic converter temperature sensor and a control computer.