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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.0L (LSY) - Repair Instructions >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement >> Cleaning and Inspection Procedure - Conditional

Cleaning and Inspection Procedure - Conditional

  1. GM5034350Courtesy of GENERAL MOTORS COMPANY

    Disconnect the electrical connector. (2) [5x]

  2. Fuel Injection Fuel Rail Wiring Harness (1) - Remove
  3. GM5034349Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not soak or submerge the fuel rail or injectors in solvent.

    Clean the exterior of the fuel rail (2) and injectors with solvent.

  4. CAUTION:

    Refer to Fastener Caution .

  5. Inspect the fuel injection fuel rail pressure fuel sensor (1) for damage.
    1. If replacing, dry the fuel injection fuel rail pressure fuel sensor bore in the fuel rail with a lint free cloth.
    2. The bore should be free of fuel, debris, and burrs.
    3. Lubricate the fuel pressure sensor bore, in the fuel rail, with clean engine oil.
    4. Lubricate the threads and sealing area on the fuel injection fuel rail pressure fuel sensor with clean engine oil.
    5. Install the fuel injection fuel rail pressure fuel sensor hand tight.
    6. Remove the fuel pressure sensor and re-lubricate the bore, threads, and sealing area.
    7. Re-install the fuel pressure sensor. Tighten the fuel injection fuel rail pressure fuel sensor to 32.5 N.m (24 lb ft).
  6. Inspect the fuel rail and components for the following conditions:
    • Damage, debris, or restrictions to the fuel rail
    • Damage, debris, or restrictions to the fuel ports in the fuel rail
    • Damage to the mounting area for the fuel rail
    • Damage to the fuel rail mounting bolts
    • Damage to the threads on the fuel rail fuel feed fitting