Fuel Pump: Description and Operation

Fuel System Components:

Fuel Pump:

PURPOSE

The Fuel Pump provides a steady supply of high pressure fuel from the Fuel Tank, to the Fuel Injectors, where it is injected into, and used by, the engine.

OPERATION

The fuel pump relay controls fuel pump operation. The fuel pump operates only when the engine is cranking or running. It does not operate when the engine is not running, even with the ignition switch turned "ON". During cranking, power from the ignition switch causes the fuel pump relay to close energizing the fuel pump. The fuel pump works in conjunction with the following components:

^ Fuel pressure regulator

^ Fuel pump relay

^ Inertia fuel shutoff switch

NOTE: The fuel pump is protected at its inlet by a filter screen. This screen filters dirt, water and contaminants which could plug or damage the internal pump components. The fuel tank has a drain plug for draining fuel which may be contaminated with water.