The 5-Minute Process of Identifying a Defective Fuel Injector

Figure 1: Fuel Injector Testing Instrument (a sensor placed at one location tests all the injectors in an engine)

Attach the sensor to the designated location in the engine compartment.

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Observe the impact intensities generated when injector valves open and close, as well as the opening times of the valves.

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Diagnose defective injector by comparing opening and closing impact intensities across all injectors.

In this example, the detection of the failing injector in cylinder No. 4 is straightforward.