Resources for the Repair and Maintenance of your Mercury Grand Marquis
Mercury Grand Marquis Models:
Mercury Grand Marquis Problems
Coolant Leak and/or Engine Overheating Due to Cracked Intake Manifold
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.
Engine Performance Problems Due to Failed Throttle Position Sensor
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.
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.
EVP Sensor Failure May Cause Drivability/Fuel Economy Issues
The EGR valve position (EVP) sensor can fail on this vehicle. The EVP sensor measures the EGR valve position and transmits the date to the engine control computer. If it fails, drivability and fuel economy can suffer, the Check Engine Light will commonly illuminate.
Airbag Light Due to Failed Spring in Seat Belt Buckle
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.
Mercury Grand Marquis Recalls (Recent)
Windshield May Not Be Properly Installed
RepairPal Expert Overview:
The windshield may not be properly installed, which may cause wind noise, squeaks/rattles, and/or water leaks. If the windshield comes loose in a crash, vehicle occupants may be less protected. Dealers will replace the windshield free of charge. The recall began November 22, 2006. The Ford recall number is 06C15.
Learn more »Ford Explorer Sport Trac Recall 07V336000
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 »Mercury Grand Marquis Recall 08V051000
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 »Battery Fusible Link may Overheat and Catch Fire
RepairPal Expert Overview:
The battery cable includes a fusible link that may contact the #2 cross member. Over time this contact could damage the fusible link. The damaged link could overheat which could lead to a fire. Dealers will inspect the fusible link and position it away from the cross member. A damaged fusible link will be replaced. This recall is expected to begin on November 18, 2005. The Ford recall number is 05S38.
Learn more »Wheel May Separate from the Vehicle
RepairPal Expert Overview:
Improper heat treatment of the wheel bearing and hub assembly may allow the hub to fracture. If the hub fractures, the wheel will only be retained by the brake caliper assembly. If the wheel falls off while driving, a crash could result. Dealers will inspect and replace both front wheel bearing and hub assemblies free of charge. The recall began June 22, 2007. The Ford recall number is 07S54.
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 does ...
Do these tensioners weaken with time, if not do the smaller serpentine belts stretch over time
this idiot shorted out my lighter by sticking a screwdriver down in it and apparently it also shorted my cruise control as well. All the fuses are numbered but it says "see owners manu.". don't ha...
Mercury Grand Marquis Stories
Over all it's been a god car, I've had two issues that I believe shouldn't have been & that is in the older cars if the upper ball joints went bad in either side you removed & installed what ever side needed to be repaired, not on my 2004 Mercury Grand Marquis, yo have to replace the whole upper assembly on account that the ball joint it comes welded to the upper arm, not only is it very expensive but a pain to do it your salve. The other issue is that the door locks acts crazy, you lock the doors & it's start to make a clicking sound & the driver side lock goes in the open position & stays in the open position, so you think that your locking your car @ night, not its not, you wake up next morning & yes you guest it its in the open position not only is this a safety issue, persons that want to get into your car & take your property & you have a losses of personal property. If any one can tell me were to look in the car for the possibility for me to be able to at least try & repair it myself, maybe a sensor & the position were such part or sensor might be, thank a million if you can help. Herbert Arenas My e-mail address is Harenas747@aol.com
Hi i am 15 and this is my first car i paid $500.00 for it. it has a major gas and oil leak and had its tail pipe ripped off but, overall its a nice car. its got a 5.0 liter V8 in it. its extremly quiet for a V8 and with no tail pipe its still quiet.
its also got ajustable air shocks. a mini air compresser kicks on when it runs. i think its for the shocks but it could also be for the vacume system which runs the fuel injecters. any advice?
The 2003 Mercury Grand Marquis has been the most problematic one my family has ever had, and we've had them constantly since the late '70s. This one had electrical issues from the get-go. The door locks and windows and wipers all got funky at least once, and one door lock has never fully functioned. The AC has gone out a few times, the brakes need replacing more often than a NY cabbie's, we've had to replace engine coils at least 4 times, the seatbelts lock in place so you're pinned to the seat---all-around fun. My mother touts its heft as a safety feature, while I feel its safety is diminished if you have to sit in front of the shoulder strap to breathe, or find your brakes wearing down to nubs every other year. It also sheds its grille pieces everywhere so it looks like a toothless creature. It's a comfortable car to ride in for long trips, but it doesn't feel reliable. Thinking back, we did have a fair amount of issues with these cars over the years. Next time I buy, I want another Subaru Legacy, which in 10 years gave me zero problems, not even with the sunroof.
Last note: I got to this site looking for a solution when the rest of my family was stranded in the car and it wouldn't shift gears for them to drive. I found a solution here suggested for a '96 Marquis: pump the brake and wiggle the wheel while you try to shift to Neutral. My story then mistakenly ended up with the '92 Marquis heading, but I want to make sure 2003 Grand Marquis owners know the fix will work for them if their gearshift is stuck in Park. Then, as someone elsewhere suggested, if you can't go to the shop right away, "park" in neutral with the emergency brake so you don't get stuck in Park again.
Just wanted to say thank you to 1996 Mercury Grand Marquis Visitor, Astoria, NY, October 21, 2011 08:16. My family was stuck with a 2003 Grand Marquis stuck gearshift that wouldn't shift out of park, 2 hours from home at 2am, and your solution was the only one that worked! Pumping the brake and wiggling the wheel while the engine was on as if everything was regular did the job to shift to Neutral, which freed them up to shift to Drive normally. Thank you! Pretty reprehensible that they even had a suggested solution in the manual---shouldn't they have taken care so the problem never occurred? My family has long gotten Mercury Grand Marquis but never had them longer than 3-5 years and no major issues. But from the start, this one is the worst ever. Constant problems with everything from sticking choke-you seatbelts to dying engine coils to brake wear to AC failures to just weird electrical issues. Even the way the cheap plastic grillwork falls out---pathetic. I never had any problems like this with my Subaru Legacy, so if I'm doing the picking next time, that's my choice.
P.S. Sorry, I don't know how this showed up under 1992 Mercury Marquis. I was clearly in another section, since I was quoting someone with a '96. Don't know what happened, but I wanted the helpful advice amplified for other future internet searchers.
Bought this used with just under 100,000 miles on it. Not running right when I purchased it but did some work to it and it's been a very good car. I beefed up the rear suspension with coil over shocks and Moog cargo coil springs plus the addition of a police rear sway bar (badly needed for these large cars). I would like to stiffen up the front suspension and it would be a pretty nice handling vehicle for it's size. Nice to see Ford made the steering box a quicker ratio over the old 4 turn lock to lock boxes.