How does the secondary air pump work?
How does the secondary air pump work? Secondary air injection systems pump outside air into the exhaust stream so unburned fuel can be burned. Early systems have a belt-driven air pump. Newer aspirated systems use the vacuum created by an exhaust pulse to pull air into the pipe. The latest systems use an electric motor to pump air. What does the secondary air injection pump do? The secondary air injection pump—The electric secondary air injection pump suppliespressurized, filtered air to the secondary air injection solenoid (shutoff and check)valves. The secondary air injection pump is a turbine type pump that is...