2002 Mercury Grand Marquis Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2002 Mercury Grand Marquis

2002 Mercury Grand Marquis Problems

Intake Manifold May Crack Leaking Coolant Behind the Alternator

The composite (plastic) intake manifold may crack near the thermostat housing and cause a coolant leak. Ford released an updated manifold that was reinforced to prevent a recurrence. No recall was issued for this problem but Ford did extend the warranty to seven years on some models from the date of purchase.

Misfire due to failed spark plugs or ignition coil

Bad spark plugs or an ignition coil can cause ignition misfire, which will illuminate the Check Engine Light.

Heater Hose Outlet May Leak Coolant at Back of Intake Manifold

The heater hose outlet may leak coolant at the back of the intake manifold. Sometimes this is misdiagnosed as a leaking intake manifold gasket because it resembles a leaking manifold.

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2002 Mercury Grand Marquis Reviews

I have a 2002 mecury grand marquis, have had a lot of repair, wiper pivot arm ass,replace idle air control valve twice, replaced #1 coil, #2 coil,just a couple of mos. ago replaced #5coil, had bearings go out of ac compresser, replaced. All this time in the last year my car has had a low roar when excelerating my gas milage is in the pits gone from 18 in city to 13.5 had 3 different shops one a...
over all car is a smooth riding luxury sedan,,, add a few more toys and it would be a lincoln at about a3rd of the price,,, but a lot of problems with the automatic temp control system

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