Mopar MD158484 Injector-Fuel

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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 a crew driver against the injectors and press your ear against the handle of the screwdriver. Feel the operation of each injector. Prior to installation, lubricate the O-rings with a light film of clean engine oil. Push the top of the injector straight into the fuel rail receiver cup, taking care not to damage the O-ring. Slide the open end of the injector clip into the top slot of the injector, onto the receiver cup ridge, and into the side slots of the clip. Install the fuel rail.

First remove the air cleaner assembly and relieve the fuel system pressure. Disconnect the negative battery cable and remove the fuel pressure regulator if necessary. Remove the Torx screw and carefully pry off the injector cap. Use a small screwdriver to gently pry the injector from the throttle body. Peel off the upper and lower O-rings from the injector, making sure to retrieve the lower O-ring if it is not on the injector.

Connect the fuel supply line quick-connect fitting, reattach the fuel pump module electrical connector, and the negative battery cable. Turn the ignition key to the ON position several times to pressurize the fuel system and inspect for leaks, rectifying any issues as necessary. Complete the installation by reversing the removal steps, ensuring to install a new upper intake manifold gasket on V6 engines and tightening the upper intake manifold bolts.

Remove the fuel rail assembly and place the fuel rail assembly on a clean work surface so the fuel injectors are accessible. Remove the injector lock ring from the fuel rail and injector by prying it off with a small screwdriver. Pull the injector straight out of the receiver cup. Inspect the injector O-rings for damage. Replace them with new ones if necessary (Push the new O-ring over the tip of the injector and into the groove Insert a small screwdriver under the 0-ring and pry it off - be careful not to damage the injector tip). Prior to installation, lubricate the O-rings with a light film of clean engine oil. Push the top of the injector straight into the fuel rail receiver cup, taking care not to damage the O-ring. Slide the open end of the injector clip into the top slot of the injector, onto the receiver cup ridge and into the side slots of the clip. Install the fuel rail.

With the engine running or cranking, listen to the sound from the injector with an automotive stethoscope or by touching the area of the throttle body above the fuel injector with your finger.