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.