Removal (Dynasty, Fifth Avenue, Imperial & New Yorker)
- Release fuel pressure. See FUEL PRESSURE RELEASE under REMOVAL & INSTALLATION. Disconnect battery cables. Drain cooling system. Remove air cleaner-to-throttle body hose.
- Disconnect control cables and linkages at throttle body. Disconnect Automatic Idle Speed (AIS) motor and Throttle Position Sensor (TPS) wiring harness connectors at throttle body. Remove vacuum hoses from throttle body and intake manifold.
- Remove EGR tube flange from air intake plenum (upper intake manifold). Disconnect vacuum hoses and EGR tube flange from air intake plenum. Disconnect wiring connectors at charge temperature sensor, MAP sensor and O2 sensor heater. Remove support brace from cylinder head to air intake plenum.
- Wrap shop towel around fuel line connectors. Remove fuel lines from fuel rail by pushing inward on plastic ring, located at end of fuel line fitting, and pulling fuel line from fitting.
- Remove ignition coils and alternator bracket from air intake plenum. Remove air intake plenum bolts. See Fig 1 . Rotate air intake plenum back over valve cover. Cover intake manifold ports using shop towels.
- Disconnect vacuum hose at pressure regulator. Disconnect fuel injector wiring harness from engine wiring harness. Disconnect necessary sensor wiring connectors, near fuel rail and intake manifold.CAUTION: Intake manifold gasket seal contains sharp edges and must be handled carefully to prevent personal injury.
- Remove fuel rail bolts and fuel rail. Disconnect coolant hoses at intake manifold. Remove 8 intake manifold bolts in proper sequence, and remove intake manifold. See Fig 2 . Remove intake manifold gasket and seal retaining screws. Remove gasket.