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.
Resources for the Repair and Maintenance of your Mercury Grand Marquis
Mercury Grand Marquis Models:
Mercury Grand Marquis Problems
The throttle position sensor (TPS) may fail. Common symptoms of a defective TPS can be rough idle, hard starting, hesitation on acceleration, poor fuel economy, and stalling.
A spring in the seat belt buckle may wear or fail, causing the airbag light on the instrument panel to illuminate. Failed buckles will require replacement.
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.
Mercury Grand Marquis Recalls (Recent)
Summary: THREADED INFLATOR COMPONENTS MAY HAVE BEEN DAMAGED DURING ASSEMBLY WHICH MAY ALLOW COMPONENTS TO SEPARATE WHEN INFLATOR RECEIVES A SIGNAL TO DEPLOY THE AIR BAG.Learn more »
Summary: THE PASSENGER SIDE AIR BAG HAS AN INFLATOR BODY THAT CRACKED DURING FORMING OF THE CURL THAT RETAINS THE IGNITER PLUG IN THE END OF THE INFLATOR. ALSO THE IGNITER END CAP CAN SEPARATE FROM THE INFLATOR.Learn more »
Summary: WHEN IN THE SECONDARY LATCHED POSITION, THE DRIVER DOOR LATCHES MAY OPEN WHEN SUBJECTED TO TRANSVERSE LOADS LESS THAN THAT SPECIFIED IN FMVSS NO. 206, "DOOR LOCKS AND DOOR RETENTION COMPONENTS."Learn more »
Summary: ON CERTAIN PICKUP TRUCKS, PASSENGER VEHICLES, SPORT UTILITY VEHICLES, AND MOTOR HOMES CHASSIS, THE SPEED CONTROL DEACTIVATION SWITCH MAY, UNDER CERTAIN CONDITIONS, LEAK INTERNALLY AND THEN OVERHEAT, SMOKE, OR BURN.Learn more »
Summary: FORD IS RECALLING 225,000 MY 1992-2003 ECONOLINE, MY 1993-1995 TAURUS SHO, MY 1992-1998 CROWN VICTORIA, MY 1993 BRONCO, F-SERIES, MY 1995-1997 F-SERIES SUPER DUTY STRIPPED CHASSIS, MY 1992-1998 MERCURY GRAND MARQUIS, AND MY 1992-1995 LINCOLN TOWN CAR VEHICLES. THE AFFECTED VEHICLES WERE PREVIOUSLY REPAIRED USING A WIRING HARNESS THAT IS NOT COMPATIBLE WITH THE VEHICLE CIRCUIT POLARITY.Learn more »
Mercury Grand Marquis Questions and Answers
this is the second tranny i am putting in it will not shift form low gear when driving there is no modulator on it but i have changed the speed control sensor i was told there may be a computer s...
when car shifts to 4th and you let off gas it quits pulling you have to give it a lot of gas for it to start pulling again already changed fluid and filter
when car shifts to overdrive and you let off the gas the transmisson kicks out of gear like it was shifted to neutral give it a lot of gas it starts working again 123 &reverse work fine only d...
Do these tensioners weaken with time, if not do the smaller serpentine belts stretch over time
Mercury Grand Marquis Reviews
My 1999GM-LS runs well now 140,000 miles since new. Had AC control unit, fuel pump, Idle air control valve, rotors, cracked intake manifold replaced. Recently a slight vibration developed at idle when engine is hot. Most noticeable at steering wheel. Dealer can't find fault - deemed normal? Cracked intake manifold - is bound to happen when plastic bonded to aluminum. Grade school physics tells us that metal and plastic expands and contracts differently when temperature changes. can't believe any Ford engineer could overlook this?? when the GM was designed. Perhaps the plastic manifold are designed to fail!
Two ton a fun! Almost economy car freeway MPG (idling @ 60mph), quiet, relaxed, upscale, bullet proof engine/ drive train, cheaper parts and insurance!
2003+ GS (base car) is the car to get (03+-latest upgrades), change out lighting control module (weak relay-see ebay/forums) run synth 5-30 only and enjoy your V8/281 powered lux cruiser! Bought an 03 for my daughter with 62k on it, one old lady owner for $4000 and daughter loves it-ease of use and comfort. 25+ mpg on freeway, about 20 mpg overall. Truck frame, engine, drive train. Sleeper used car best buy folks that's safe, reliable, cheap to buy used now with low mileage and typically easy use (thanks, old folks) ! No brainer vs high mileage, beat Japanese rig in high demand! Picky Engineer
a great car, have owned 4 previous year same car.
one problem...trunk open light comes on when trunk is shut.
have to reshut lid 2 or 3 times to stop it.
Very Comfortable car, especially on long trips. This vehicle was made to Excel on the highway where the gas mileage using cruise control is compatible with smaller vehicles that feel and look like tin boxes. Poor gas mileage in the City due to stop and go traffic. Best mileage on the highway was 28.6 mile average from NYC to Hershey Pennsylvania using cruise control most of the way. Had two Crown Victorias prior to this Grand Marquee and can notice a big difference in the ride. I will enjoy this car to the end. Approaching 90k on the odometer.
Bought used with 80,000. Now has 158,000. 28-29 MPG hiway,20 everyday.Has never failed to start or broken down on road. Some electrical issues,hazard switch,power window switch,door ajar sensor. Love this car.