![]() The electrical connectors to each fuel injector are unlocked and removed. The supply and return lines are removed from the fuel rail.The upper plenum on the intake manifold is removed along with any cables, hoses, or wiring that restricts access.Once the engine is cold, the pressure within the fuel rail is relieved by briefly running the engine with the fuel pump fuse out.Either option requires removing the injector from the car and the following procedure is typical: The choice to repair versus replace will depend on exactly what is wrong with the injector as well as customer preference. ![]() If the injectors are serviced, specialized cleaning and test equipment are required. Injectors can be serviced once removed from the car or replaced outright with new injectors. How do mechanics replace a fuel injector? A professional injector service facility will clean each injector ultrasonically and replace these filters for a relatively low cost. All injectors have tiny internal filter baskets. When an engine is already disassembled, or if you are installing a new engine, that is a perfect time to service the injectors as a set. These deposits can cause an imbalance in the performance of the injectors from cylinder to cylinder. All fuel injectors will have deposits given enough mileage. Major engine repairs, engine replacement, or lengthy storage.The codes are read and the fuel injector is tested directly, as needed. Some fuel injection failures, for example, a faulty solenoid, may cause a trouble code to be set in the PCM and that will cause the check engine light to illuminate. If an externally-leaking injector is suspected, do not start your car due to the fire hazard. ![]() There should be no external leak from a fuel injector. If you notice any fuel odor around your car, the possibility of a leaking fuel injector should be considered. ![]() Fuel injectors should not leak fuel into the intake manifold when the car is off. Poor engine operation has many causes but faults in the fuel injection system, including the fuel injectors, are high on the list of possibilities. Rough idle, loss of power, or misfiring.When to consider replacing a fuel injector: 2003 Ford F-350 Super Duty V8-6.0L Turbo DieselĢ010 Ford F-350 Super Duty V8-6.4L Turbo Diesel ![]()
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