OEM Mercury Grand Marquis Intake Manifold

Mercury Grand Marquis Intake Manifold Parts and Q&A

• Intake Manifold, Lower
  YR3Z-9424-BA
  Q: How to remove the intake manifold from gasoline engines on Mercury Grand Marquis?

  A:

  The gasoline engine intake manifold requires starting the process by disconnecting the battery ground cable and emptying the engine cooling system. Start by taking off the air cleaner unit with the outlet pipe and disconnect the fuel spring lock coupling. The sequence of removal starts with the accessory Drive Belt followed by the wiper mounting arm and pivot shaft. Journey the vehicle onto a hoist then block the Crankshaft Position (CKP) sensor electrical connection and detach the pin-type retainer from the A/C compressor bracket. The technician disconnects three electrical interfaces: Power Steering Pressure (PSP) switch, the A/C compressor clutch and oil pressure sensor connections. The power steering electrical connector needs to be disconnected in advance when lowering the vehicle. Unplug all fuel charging wiring connectors that link to Ignition Coils as well as Fuel Injectors. The Accelerator Cable together with speed control actuator cable and throttle return spring need removal while the retaining bolts should be removed too. Once the cables move clear of the Exhaust Gas Recirculation (EGR) tube heat shield continue to position them away. The bolt removal and EGR tube heat shield should be completed first before disconnecting the electrical connector and vacuum hose and the EVAP canister purge valve vacuum hose. The generator requires cable and electrical connector removal from their locations including the harness retainer before the bracket bolts can be detached. The maintenance process requires detachment of the upper radiator hose as well as the Idle Air Control (IAC) valve and the Throttle Position (TP) sensor electrical connectors along with separation of the heater water hose. The EGR system module requires tube nut disconnection from the module while the pin-type fuel charging wiring should be separated from the crash bracket allowing cable removal from the bracket. A rubber band or tie strap prevents the cylinder head from being hit by the crash bracket bolt before pulling out the stud. Stop and then detach the vacuum hoses and vacuum harness after removing the generator harness position retainer from the LH front stud as well as the fuel charging wiring pin-type retainer from the manifold rear. Remove the ground wire connector from both the RH rear stud along with the Coolant Temperature Sensor electrical connector. After removing the eight ignition coils along with their bolts you should take out the water outlet adapter with its bolts and detach the water Thermostat (disposing the O-ring) and detach the intake manifold bolts to discard the intake manifold gaskets and clean both sealing surfaces.
• Intake Manifold
  3W7Z-9424-AE
  Q: How to install the intake manifold on natural gas engines on Mercury Grand Marquis?

  A:

  Start installing the intake manifold on natural gas engines by placing new intake manifold gaskets before inserting the intake manifold. Fasten the manifold through its bolts while following the given tightening sequence. To proceed attach the water Thermostat while installing an O-ring and secure the water outlet adapter by properly tightening its bolts. Secure the generator support bracket then tighten all its bolts. Secure the eight Ignition Coils through proper bolting methods before connecting the upper radiator hose into the water outlet adapter. Secure the heater water hose to the intake manifold before placing all Fuel Injectors and the fuel injection supply manifold as one unit then bolt it down using four bolts. The next step involves tightening the isolation valve bolts followed by EGR tube attachment to EGR Valve components while connecting vacuum hoses between EGR vacuum regulator solenoid and throttle body adapter. The crankcase ventilation tube that needs installation can be connected at two points before both vacuum hoses connect to the throttle body adapter and EGR valve. The hoses should be installed on both the differential pressure feedback EGR system and fuel lines. Place the fuel charging wiring and tighten bolts before arranging all cables with their bracket and securing them using bolts. Sequence the brake installation procedure by first connecting Throttle Cables to the throttle body and speed control actuator cables then adding the idle air control valve, differential pressure feedback EGR system electrical connector, EGR vacuum regulator solenoid, radio ignition interference capacitor, Throttle Position Sensor, generator, Camshaft Position Sensor, cylinder head temperature sensor jumper, and A/C pressure transducer to the fuel charging wiring. The fuel charging wiring electrical connectors need to be fastened securely on the inner fender splash shield after which you should reposition and tighten the wiring on the stud. Finish the installation of the power distribution box access cover while connecting the generator Battery Cable and tightening its nut. Complete the wiring process by connecting the isolation valve jumper to the fuel charging wiring electrical connector and then add the engine Coolant Temperature Sensor and fuel temperature sensor and Fuel Pressure Sensor in both order of connection. The Wiper Arm installation requires appropriate fuel charging wiring electrical connector attachment to eight ignition coils and eight fuel injectors while you should also install the pivot shaft and air cleaner outlet tube.