Explorer Sport Trac 2WD V6-4.0L (2009)
Air Injection Pump: Description and Operation
Engine Control Components
Secondary AIR Pump
The secondary AIR pump provides pressurized air to the secondary AIR system. The secondary AIR pump functions independently of RPM and is
controlled by the PCM. The secondary AIR pump is only used for short periods of time. Delivery of air is dependent on the amount of system
backpressure and system voltage. The secondary AIR pump draws dry filtered air from the intake air system downstream of the mass air flow/intake air
temperature sensor. For additional information on the secondary AIR injection system, refer to Secondary Air Injection (AIR) System See: Description
and Operation.
Secondary Air Pump
Secondary Air Pump
