Excursion 4WD V8-5.4L SOHC VIN L (2001)
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.
