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Home >> Cadillac >> 2023 >> CT4 V, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.7L - Repair Instructions >> Repair Instructions >> Fuel Rail Pressure Sensor Replacement >> Installation Procedure

Installation Procedure

  1. GM5404945Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the fuel rail threads are clean and free of any excess fuel, or the fuel injection fuel rail fuel pressure sensor will NOT seal properly.

    Lubricate the threads and sealing surface of the NEW fuel injection fuel rail fuel pressure sensor with one drop of clean engine oil.

  2. NOTE:

    DO NOT apply force to the plastic housing of the sensor. Apply force only at the attached hexagon when loosening or tightening the sensor.

  3. Fuel Injection Fuel Rail Fuel Pressure Sensor (2) @ Fuel Injection Fuel Rail - Install NEW and hand tighten
  4. Fuel Injection Fuel Rail Fuel Pressure Sensor (2) - Remove
  5. Lubricate the threads and sealing surface of the NEW fuel injection fuel rail fuel pressure sensor again with one drop of clean engine oil.
  6. Fuel Injection Fuel Rail Fuel Pressure Sensor (2) @ Fuel Injection Fuel Rail - Install and tighten - Fastener Specifications
  7. Electrical Connector (1) @ Fuel Injection Fuel Rail Fuel Pressure Sensor - Connect
  8. GM5045008Courtesy of GENERAL MOTORS COMPANY

    Crankcase Vent Passage Seal (4) - Install NEW

  9. Intake Manifold Gasket (3) - Install NEW [4x]
  10. GM5507557Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold (1) - Install

  11. GM5508646Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Bolt (1) - Install and tighten [6x] - Fastener Specifications

  12. GM5507451Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Install

  13. GM5399157Courtesy of GENERAL MOTORS COMPANY

    Charge Air Cooler Outlet Air Tube (2) @ Throttle Body (3) - Install

  14. Retainer Spring (1) - Engage
  15. GM5507441Courtesy of GENERAL MOTORS COMPANY

    Upper Intake Manifold Cover (1) - Install

  16. GM5507437Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Stud (2) - Install and tighten [3x] - Fastener Specifications

  17. Intake Manifold Cover Bolt (1) - Install and tighten [2x] - Fastener Specifications
  18. GM5402098Courtesy of GENERAL MOTORS COMPANY

    Evaporative Emission Canister Purge Pump (2) - Install

  19. Evaporative Emission Canister Purge Pump Bolt (1) - Install and tighten [3x] - Fastener Specifications
  20. GM5504108Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness (4) - Reposition

  21. Retainer (3) - Install [4x]
  22. Electrical Connector (2) - Connect [2x]
  23. Engine Wiring Harness Bolt (1) - Install and tighten - Fastener Specifications
  24. GM5509132Courtesy of GENERAL MOTORS COMPANY

    Throttle Body Electrical Connector (1) - Connect

  25. GM5504095Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank Inlet Hose (3) - Reposition

  26. Retainer (2) - Install [3x]
  27. Evaporative Emission Canister Purge Tube (1) - Connect
  28. GM5504092Courtesy of GENERAL MOTORS COMPANY

    Evaporative Emission Pipe (2) - Connect

  29. Fuel Feed Pipe (1) - Connect
  30. GM5456829Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the intake manifold cover insulator retainers fully engage the intake manifold cover studs.

    Intake Manifold Cover Insulator (1) - Install

  31. GM5456746Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Bolt (1) - Install and tighten - Fastener Specifications

  32. GM5432174Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover (1) @ Upper Intake Manifold Bracket (2) - Install

  33. GM5432171Courtesy of GENERAL MOTORS COMPANY

    Push down on the front of the intake manifold cover (2).

  34. Intake Manifold Cover Bolt (1) - Install and tighten [2x] - Fastener Specifications
  35. Install the oil fill cap.
  36. GM5517311Courtesy of GENERAL MOTORS COMPANY

    Oil Level Indicator Tube (1) - Install

  37. GM5517312Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Oil Level Indicator Tube Bracket Bolt (1) - Install and tighten - Fastener Specifications

  38. GM5517313Courtesy of GENERAL MOTORS COMPANY

    Oil Level Indicator (1) - Install

  39. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
  40. NOTE:

    If a fuel leak occurs at the fuel rail, the fuel rail will need to be replaced.

  41. Pressurize the fuel system and inspect for leaks.
  42. Perform the intake system learned values reset. Intake System Learned Values Reset 
  43. Perform the throttle body idle air flow compensation reset. Throttle Body Idle Air Flow Compensation Reset