Mopar 4418474 INJECTOR

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Remove the air cleaner assembly. Release the fuel system pressure. Disconnect the negative cable at the battery. Place the cable out of the way so it cannot accidentally come in contact with the negative terminal of the battery, as this would once again allow power into the electrical system of the vehicle. Remove the four screws retaining the fuel inlet chamber to the throttle body. Remove the fuel pressure regulator-to-throttle body vacuum tube. Wrap a cloth around the fuel inlet chamber to catch the residual fuel and lift the inlet chamber and injector off the throttle body. Withdraw the injector from the inlet chamber. Peel the upper and lower O-rings from the fuel injector. Remove the snap-ring retaining the seal and washer on the injector, followed by the seal and washer. Remove the bolt retaining the injector cap and lift the cap off the injector using two screwdrivers inserted in the slots provided for this purpose. Pry the injector from the pod using a screwdriver inserted in the holes in the side of the electrical connector. After removal, make sure the lower injector O-ring is removed from the pod. Install a new O-ring, washer, and seal on the injector, retaining them with the snap-ring. Insert the injector into the fuel inlet chamber. Place the injector/fuel inlet chamber in position on the throttle body and install the pressure regulator-to-throttle body vacuum tube. Place the assembly into the throttle body and install the retaining screws. Tighten the screws to the specified torque. Install new O-rings on the injector and injector cap. Place the injector in the pod and position the injector so the cap can be installed without interference. Rotate the cap and injector so they line up with the attachment hold, push down to ensure a good seal, and install the retaining screws. Tighten the screws to the specified torque. Connect the negative battery cable, start the engine, and check for leaks. Turn off the engine and install the air cleaner assembly.

Start by releasing the fuel system pressure, disconnecting the negative cable at the battery, loosening the supply hose clamp at the fuel rail inlet, removing the fuel pressure regulator vacuum hose, bracket bolts, and hose, removing the fuel rail-to-camshaft cover bracket bolt, unplugging the fuel injector wiring connector, using a small screwdriver to remove the fuel injector heat shield clips, removing the four fuel rail attaching bolts, and carefully pulling the injectors straight out of the ports.

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.

To replace the O-rings, use a small screwdriver to remove the old O-ring, roll the new one into the groove and apply a drop of engine oil to the O-ring.

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.