How you can Test a Undesirable Fuel Injector 1Park your vehicle within a well-ventilated location. Open the hood of the automobile and apply the parking brake.2Set the transmission in Park (automatic transmission) or Neutral (manual transmission). Block the rear and front wheels with wooden blocks and start the engine.3Put on a mechanic's stethoscope and probe the suspected fuel injector by putting the tip with the tool against the injector's physique.
It is best to hear a series of clicks because the injector's valve opens and closes. For those who do not hear the clicks, the injector is negative or not receiving power. Turn off the engine.4Unplug the electrical connector on the suspected fuel injector. Set your digital ohmmeter to a low range on the Ohm scale. Turn on the meter and probe each electrical contacts on the injector with your meter probes. In the event you get a blank screen on your meter's display, the coil inside the injector has an open. A reading of "0.00" on the meter's display indicates the injector's coil has a brief to ground. In every case, you'll need to replace the injector.
If your meter's display shows a resistance worth apart from "0 car diagnosis tool," examine the service manual for your certain car to make certain you've the correct worth and proceed to the next step.5Connect a nod light on the harness connector from the suspected fuel injector. Get started the engine. The nod light must flash on and off. In case you did not hear the injector clicking in step three, this signifies the control module is feeding energy for the injector, however the injector is just not responding and should be replaced. In the event the nod light will not flash, you'll need to examine the circuit and components that feed energy to that injector Obd2 scanner.6Turn off the engine.7Plug inside the harness connector towards the suspected fuel injector and close the hood.
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