E 150 V8-4.6L SOHC VIN W (2004)
Air Injection Pump: Description and Operation
ELECTRIC AIR PUMP
Electric Air Pump
The electric AIR pump (Figure 112) provides pressurized air to the Secondary Air Injection system. The electric AIR pump functions independently of
rpm and is controlled by the PCM. The electric 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 inlet system of the AIR pump incorporates a splash cap which helps to guard against dirt and water.
