2015 Infiniti QX80 Base, AWDFACTORY OEM SERVICE PROCEDURE

High Pressure Fuel Pump

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.

Operating Description 

Fig 1: High Pressure Fuel Pump Operation Diagram
G06932868Courtesy of NISSAN NORTH AMERICA, INC.

Operating Chart 

Fig 2: High Pressure Fuel Pump Operating Chart
G06932869Courtesy of NISSAN NORTH AMERICA, INC.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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