High Pressure Fuel Pump

The high pressure fuel pump is activated by the exhaust 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.