F 150 4WD Pickup V8-5.4L VIN V Flex Fuel (2006)
Air Injection Pump: Description and Operation
SECONDARY AIR PUMP
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 down stream of the MAF/IAT sensor.