Removal Procedure
Notice: Use care in removing the fuel injectors in order to prevent damage to the fuel injector electrical connector pins or the fuel injector nozzles. Do not immerse the fuel injector in any type of cleaner. The fuel injector is an electrical component and may be damaged by this cleaning method.
Important: The fuel injector is serviced as a complete assembly only. If the fuel injectors are leaking, the engine oil may be contaminated with fuel. Fuel injector O-rings should always be replaced whenever fuel injectors are serviced.
Important: Each fuel injector is calibrated for a specific flow rate. Be sure to use the correct part number when ordering replacement fuel injectors.
Important: Always maintain cleanliness when servicing fuel system components.
- Remove the injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
- Relieve the fuel pressure. Refer to Fuel Pressure Relief .
- Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
- Remove the fuel injector retaining clips (2).
- Remove the fuel injectors (3).
- Remove the upper fuel injector O-ring (1).
- Remove the fuel injector lower O-ring (5).
- Remove the backup O-ring (4).
Installation Procedure
Important: When ordering new fuel injectors, be sure to order the correct injector for the application being serviced.
The upper and lower fuel injector O-rings use different part numbers. To identify the correct O-ring, the upper O-ring is black and the lower O-ring is brown. Both O-rings are the same size but consist of different material. The lower O-ring uses a nylon collar, called the O-ring backup, to properly position the O-ring on the injector. Always reinstall the O-ring backup, or the sealing O-ring may move on the injector when installing the fuel rail and result in a possible vacuum leak. Fuel injector O-rings should always be replaced whenever fuel injectors are serviced
The fuel injector assembly (1) is stamped with a part number identification (2) and a build date code (3). The build date code consists of the month (4) 1-9 (Jan-Sept) or O, N, D, (Oct, Nov, Dec), the day (5), and the year (6).
- Coat all new O-rings with engine oil before installation.
- Install the back up O-ring (4).
- Install the lower O-ring (5).
- Install the upper O-ring (1).
- Install the fuel injector to the fuel rail (3).
- Install the fuel injector retaining clips (2).
- Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
- Inspect for leaks.
- Reinstall the injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
| 8.1. | Turn the ignition switch on for 2 seconds. |
| 8.2. | Turn the ignition switch off for 10 seconds. |
| 8.3. | Turn the ignition switch on. |
| 8.4. | Inspect for fuel leaks. |
