Explorer 4WD V8-4.6L VIN W (2002)
Air Injection Pump: Description and Operation
Electric AIR Pump
Electric Air Pump
The electric AIR pump (Figure 121) 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 non-serviceable filter and splash cap
which helps to guard against dirt and water.