Disconnect the electrical connector and the vacuum hose from the fuel pressure sensor. Separate the wiring harness from the fuel injection supply manifold studs in four places. Disconnect the eight fuel injector electrical connectors. Remove the ten bolts in the sequence shown, and raise the lower intake manifold slightly.. We have the following 2003 Mercury Grand Marquis manuals available for free PDF download. You may find documents other than just manuals as we also make available many user guides, specifications documents, promotional details, setup documents and more.
Discover the 2003 Mercury Grand Marquis parts diagram to easily find and identify the right components for your vehicle maintenance and repairs.. Find a visual diagram of the 2003 Mercury Grand Marquis parts to help with repairs and replacements. Get a clear understanding of the car's components.