High Pressure Fuel Pump

WARNING: This page is about a different car, the 2012 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

The high pressure fuel pump is installed at the front of the engine bank 2 side and activated by the camshaft. ECM controls the high pressure fuel pump control solenoid valve built into the high pressure fuel pump and adjusts the amount of discharge by changing the suction timing of the low pressure fuel.

Fig 1: High Pressure Fuel Pump Operation Diagram

Courtesy of NISSAN NORTH AMERICA, INC.

Fig 2: High Pressure Fuel Pump Operating Chart

Courtesy of NISSAN NORTH AMERICA, INC.