Chrysler 4612176 Injector Fuel

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With engine running, listen to injector sound with stethoscope or finger. Check injector electrical connector and test for voltage. If voltage, replace injector. Remove air cleaner, relieve fuel system pressure, disconnect battery cable, remove fuel pressure regulator. Remove Torx screw, pry off injector cap. Pry injector from throttle body, peel off O-rings. Place new O-rings on injector and cap, coat with oil. Insert injector into throttle body, align and tighten screws. Reconnect battery cable, start engine, check for leaks. Turn off engine, reinstall air cleaner.

With the engine running or cranking, listen to the sound from each injector with an automotive stethoscope and verify the injectors are all clicking the same. If you don't have a stethoscope, place the tip of as crew driver against the injectors and press your ear against the handle of the screwdriver. Also feel the operation of each injector with your finger. It should sound/feel smooth and uniform and its sound/feel should rise and fall with engine RPM. If an injector isn't operating, or sounds/feels erratic check the injector connector and the wire electrical connector. If the connectors are snug, check for voltage to the injector, using a special injector harness test light (available at most auto parts stores).