Nissan 17520-ET80B Tube Assembly Fuel

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Disconnect the fuel supply line from the fuel rail.

Relieve the fuel system pressure. Disconnect the cable from the negative terminal of the battery. Disconnect the fuel supply line from the fuel rail. Remove the intake manifold. Disconnect the electrical connector from each fuel injector. Remove the fuel rail mounting bolts. Remove the fuel injector retaining clips. To free each injector from the fuel rail, pull off the retaining clip with a pair of pliers. Remove the injectors from the fuel rail. Pull the injector straight out of its bore in the fuel rail, then remove and discard the 0-rings. Replace both 0-rings of each fuel injector and lubricate them with clean engine oil prior to installation. Whether you're installing new injectors or reusing the old ones, always remove the old 0-rings and replace them with new ones. There are two different O-rings used on each injector; they are color coded to make sure they are not installed improperly. On 2013 and earlier non-CA models, the upper O-ring (fuel rail side) is color coded blue and the lower O-ring (nozzle end) is color coded brown. On CA models and all 2014 and later models, the upper O-ring (fuel rail side) is color coded black and the lower O-ring (nozzle end) is color coded green. Install the injector retaining clips and insert each injector into its bore in the fuel rail until the retaining clip snaps into place. To install an injector, align the slot in the clip with the tab on the fuel rail, then push the injector firmly into place until the clip snaps onto the ridge of the fuel rail. The remainder of installation is the reverse of removal. Reconnect the battery and perform the necessary re-learn procedures.