OEM 2003 Mercury Grand Marquis Intake Manifold

2003 Mercury Grand Marquis Intake Manifold Parts Questions & Experts Answers

• Q: How to remove the intake manifold from gasoline engines on 2003 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.