Fuel Injection Pump

The fuel injection pump (1) is a mechanical high pressure pump. The fuel injection pump is located on the lower left side of the engine. Fuel is pumped to the fuel rails at a specified pressure. Fuel pressure is regulated by the fuel pressure regulator 1 (2) which is located on the inlet side of the fuel injection pump, controlled by the engine control module (ECM). Excess fuel from the fuel injection pump returns to the fuel tank through the fuel return pipe.