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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Fuel System (CUMMINS 5.0L)) >> Basic Inspection >> Fuel System >> Low-Pressure System Check >> Initial Setup

Initial Setup

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
  • When using compressed air for cleaning, to avoid the risk of personal injury from flying debris and dirt:
    • Do not exceed 207 kPa (2.111 kg/cm 2 , 30psi).
    • Wear appropriate eye protection and protective clothing including gloves.
  • When using high-pressure water or steam cleaning equipment, to avoid the risk of personal injury from flying debris and hot steam:
    • Wear appropriate eye protection and protective clothing including gloves and a face shield.
  • The fuel system (fuel pump, high pressure fuel lines, fuel rail, injectors) contain very high pressure fuel. To avoid the risk of personal injury or fire:
    • Do not loosen any fittings while the engine is running.
    • Wait at least 10 minutes after shutting down the engine before loosening any fittings in the high-pressure fuel system to allow pressure to decrease to a lower level.
    • Wear appropriate eye protection and protective equipment as high-pressure fuel spray can penetrate the skin.
    • Never smoke or allow sparks or flames (such as pilot lights, electrical switches, or welding equipment) in the work area. Never allow diesel fuel to spill onto a hot exhaust manifold which can cause a fire.
  • Diesel fuel and diesel fuel vapor is flammable. To avoid risk of fire or burns, never smoke or allow sparks or flames (such as pilot lights, electrical switches, or welding equipment) in the work area. Never allow diesel fuel to spill onto a hot exhaust manifold which can cause a fire.
NOTE: Before diagnosing any fuel system component, (such as fuel lines, fuel pump, fuel injectors, fuel rail, etc.) which would expose the fuel system or internal engine component to potential contaminants, prior to disassembly, clean the fittings, mounting hardware, and the area around the component to be removed. Dirt or contaminants can be introduced into the fuel system and engine if the surrounding areas are not cleaned, resulting in damage to the fuel system and engine.

Air In Fuel and Fuel Inlet Restriction 

  1. Use the following instructions for air in fuel and fuel inlet restriction setup.
    1. Disconnect the two-button quick disconnect connector (2):
      GNSALBIA2719Z-719Courtesy of NISSAN NORTH AMERICA, INC.
      • Disconnect the two-button quick disconnect connector by pressing in the locking tabs on both sides of the connector.
      • After pressing the opposing locking tabs, the quick disconnect connector can be removed from the Stage 1 fuel filter fitting.

        (1)

        : One-button quick disconnect connector
    2. Install Tools (B) between the Stage 1 fuel filter outlet connection and the fuel supply line.
      GNSALBIA2273Z-273Courtesy of NISSAN NORTH AMERICA, INC.

      Tool

      :-- - (J-54420)
    3. Disconnect the fuel supply line quick disconnect style fuel line from the inlet of the Stage 1 fuel filter.
    4. Install Tool (B) between the Stage I fuel filter inlet connection and the fuel supply line.
      NOTE: The Tool has clear lines allow for the inspection of air in the fuel.

      Tool

      :-- - (J-54420)
    5. Attach a suitable tool (A) capable of reading 0 - 101.6 kPa (0 - 1.036 kg/cm 2 , 0 to 14.73 psi) to the Tool.
      NOTE: Make sure to calibrate the suitable tool before attaching to Tool.
    6. Make certain the test lines are not kinked or leaking after installation.

Fuel Filter Restriction 

  1. Disconnect the two-button quick disconnect connector (2):
    GNSALBIA2719Z-719Courtesy of NISSAN NORTH AMERICA, INC.
    • Disconnect the two-button quick disconnect connector by pressing in the locking tabs on both sides of the connector.
    • After pressing the opposing locking tabs, the quick disconnect connector can be removed from the Stage 2 fuel filter fitting.

      (1)

      : One-button quick disconnect connector
  2. Install the Tool (B) between the fuel supply line and the stage 2 fuel filter inlet connection.
    GNSALBIA2940Z-940Courtesy of NISSAN NORTH AMERICA, INC.

    Tool

    :-- - (J-54420)
  3. Connect a suitable tool (A) capable of reading 0 - 1034 kPa (0 - 10.55 kg/cm 2 , 0 - 149.9 psi) to the Tool.
    NOTE: Make sure that the suitable tool is calibrated before attaching to the Tool.
  4. Make certain the test lines are not kinked or leaking after installation.

Drain Line Restriction 

  1. Disconnect the two-button quick disconnect connector (2):
    GNSALBIA2719Z-719Courtesy of NISSAN NORTH AMERICA, INC.
    • Disconnect the two-button quick disconnect connector by pressing in the locking tabs on both sides of the connector.
    • After pressing the opposing locking tabs, the quick disconnect connector can be removed from the Stage 2 fuel filter drain fitting.

      (1)

      : One-button quick disconnect connector
  2. Install the Tool (B) between the drain line and the Stage 2 fuel filter drain connection.
    GNSALBIA2941Z-941Courtesy of NISSAN NORTH AMERICA, INC.

    Tool

    :-- - (J-54421)
  3. Connect a suitable tool (A) capable of reading 0 - 1034 kPa (0 - 10.55 kg/cm 2 , 0 - 149.9 psi) to the Tool.
    NOTE: Make sure that the suitable tool is calibrated before attaching to the Tool.
  4. Make sure the test lines are not kinked or leaking after installation.

Tools Installed 

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