Fuel Injectors: Installation

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NOTE: If a fuel injector is being reused, make sure to install the fuel injector in the original location.

NOTE: Verify that the fuel injector-to-valve cover seal is squarely seated in the valve cover.

Using a 22 mm (0.866 in) socket or equivalent, install the new fuel injector-to-valve cover seals.

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NOTE: Do not apply engine oil to the fuel injectors.

NOTE: Only one fuel injector shown.

NOTE: If the fuel injector is being reused, make sure to install it in the original location.

Install a new fuel injector sealing washer, O-ring seal and fuel injector return fuel O-ring on the fuel injectors.

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NOTE: The PCM is programmed with an IQA code for each fuel injector. If a new fuel injector is installed record the new fuel injector IQA code and cylinder location.

NOTE: Failure to tighten the fuel injector correctly can lead to engine failure.

NOTE: If a fuel injector is being reused, make sure to install it in the original location.

NOTE: Only one fuel injector shown.

Install the fuel injector, the fuel injector hold-down clamp and a new fuel injector hold-down clamp bolt. Apply clean engine oil to the concave surface of the fuel injector hold-down clamp.

Torque: Stage 1: 22 lb.ft (30 Nm) | Stage 2: 90 deg.

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Install the fuel injector supply tubes that were removed. Refer to: Fuel Injector Supply Tube .
NOTE: A fuel injector replacement label must be installed for each fuel injector that was replaced.

Install the fuel injector replacement label to the top of the oil separator housing and circle the cylinder number for the fuel injector that has been replaced.

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NOTE: The PCM must be programmed with the proper fuel injector IQA codes.

Using the scan tool, follow the on-screen instructions and program the PCM with the appropriate fuel injector IQA code for any fuel injector that was replaced. Using the scan tool, select module Powertrain, Service Functions and IQA, then follow the on-screen instructions displayed on the scan tool. Enter the new IQA code for the replacement injector(s).
NOTE: This step is required only when a new fuel injector is being installed.

After a new fuel injector is installed, using the scan tool, follow the on-screen instructions and perform the following:
- Min. Fuel Mass Adaptation - All Cylinders.
- Clear the continuous PCM DTC's and reset the emissions monitors information in the PCM. Refer to ENGINE CONTROLS - DIAGNOSTIC METHODS (DIESEL) (2018)Engine Controls - Diagnostic Methods (Diesel) (2019)
- NOTE: The PCM Reset And Clear The Specified Functions, Reset Minimum Fuel Mass Adaptations For Cylinder X and Fuel Injector #X Adaptive Reset must be performed for any of the replaced fuel injectors.
  
  Using the scan tool, follow the on-screen instructions and Reset And Clear The Specified Function Reset Minimum Fuel Mass Adaptations For Cylinder X and Fuel Injector #X Adaptive Reset on the scan tool for any of the fuel injectors that were replaced.
- NOTE: The PCM must be programmed with the proper fuel injector IQA codes.
  
  Using the scan tool, follow the on-screen instructions and program the PCM with the appropriate fuel injector IQA code for any fuel injector that was replaced.