How To Test Fuel Injectors. Disconnect the electrical connector from the fuel injector that you need to test. Start your cars engine and press on the gas pedal.
If all fuel injectors click then the operator may perform an Ohm meter test. The test light should light up if the injector is functioning properly. If you do not hear the clicks the injector is bad or not receiving power.
You should hear a series of clicks as the injectors valve opens and closes.
Connect the harness wires and insert the red test probe into the fuel injector solenoid. Unplug the electrical connector from the fuel injector you want to test. Testing a fuel injector with a multimeter. Once the vehicle is turned off the Ohm meter can be attached to the fuel injector wiring.