Fuel Pump

Electric fuel pump is used to provide fuel pressure of 60-80 psi (4.2-5.6 kg/cm² ) and is supplied fuel by transfer pump mounted in fuel tank. To aid in starting, check valve in pump maintains pressure in lines when engine is not running. Fuel accumulator and line pressure regulator "O" ring also act to hold pressure in system.

Fuel pump is controlled by relay to prevent it from continuing to operate if engine stalls. It can be wired in several ways. There are 2 common circuits that are used to switch on the airflow sensor or coil. These components are energized by ignition system. When testing system, fuel pump relay must be by-passed.