You should relieve the fuel system pressure, remove the upper intake manifold with the lower intake manifold and the fuel pipe retaining clip, disconnect the fuel feed pipe from the
Fuel Injector rail, and use compressed air to remove debris from the area where the fuel injectors enter the intake manifold, remove the fuel rail bolts and the fuel rail with the fuel injectors, disengage the fuel injector electrical connector lock, disconnect the fuel injector electrical connector and remove the fuel injector retainer clip, the fuel injector, and the fuel injector seals.