1991 Mercury Marquis problems

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The Mercury Marquis is a model line of automobiles marketed by Mercury from 1967 to 1986. Deriving its name from a title of French nobility, the Marquis was introduced as the divisional counterpart of the Ford LTD; four generations of the two model lines were paired through rebranding. Initially slotted as the flagship Mercury full-size range (above the Monterey), the Marquis would serve as the basis for the later Mercury Grand Marquis.

The first three generations of the Marquis were full-size sedans (alongside the Mercury Colony Park station wagon). For the fourth generation, the Marquis became the mid-size Mercury sedan, following the 1983 split of the Marquis and Grand Marquis into distinct product lines. As Ford Motor Company expanded its use of front-wheel drive, the Marquis ended production after the 1986 model year, replaced by the Mercury Sable (the Mercury counterpart of the Ford Taurus). As the Grand Marquis, the nameplate continued on until the closure of Mercury during the 2011 model year.

For its first three generations, the Mercury Marquis was produced by Ford in Hapeville, Georgia (Atlanta Assembly), Hazelwood, Missouri (St. Louis Assembly), and Pico Rivera, California (Los Angeles Assembly); the fourth generation was produced by Atlanta Assembly and in Chicago, Illinois (Chicago Assembly).

1991 Mercury Marquis

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Common 1991 Mercury Marquis problems

The Mercury Grand Marquis, a full-size luxury sedan, was produced by the Ford Motor Company from 1983 to 2011. The 1991 model year, in particular, has been the subject of various complaints from owners, with the most common problems centered around the lights, engine, transmission, and fuel system.

  • Headlights Not Working Properly: The 2005 Mercury Grand Marquis has the most reported problem of headlights not working properly. This issue can compromise the driver's visibility, making it a serious safety concern. The average cost to fix this issue is around $500, with an average mileage of 83,000 miles.
  • Transmission Failure: Transmission failure is another common problem in the Mercury Grand Marquis, particularly in the 1991 model year. This issue can cause the car to rev up when the throttle is applied, as if it were in neutral, and can result in poor fuel efficiency and a loss of power. One possible cause for this issue is a malfunctioning modulator valve, which is run off of manifold vacuum.
  • Poor Acceleration: Poor acceleration is a common complaint among owners of the 1989 Grand Marquis. This issue can be caused by various factors, including engine problems, fuel injectors that stop working, or running hot.
  • Fuel Injectors Stop Working: The 1985 Grand Marquis has a reported problem of fuel injectors stopping work. This issue can cause poor acceleration, stalling, and other engine performance issues.
  • Engine Running Hot: The 1985 Grand Marquis also has a reported problem of the engine running hot. This issue can cause the engine to overheat, potentially leading to severe engine damage if not addressed promptly.
  • Surges: The 1990 Grand Marquis has a reported problem of surges. This issue can cause the engine to run erratically, potentially leading to poor fuel efficiency and decreased engine performance.
  • Coolant Evaporation: The 1991 Grand Marquis has a reported problem of coolant evaporating within a month. This issue can cause the engine to overheat, potentially leading to severe engine damage if not addressed promptly. However, it is not considered a significant concern as coolant can be added easily and free of charge.
  • Poor Fuel Efficiency: The 1991 Grand Marquis has a reported problem of poor fuel efficiency. This issue can cause the car to consume more fuel than expected, leading to increased fuel costs.
  • Windows Not Working: The 1991 Grand Marquis has a reported problem of windows not working. This issue can compromise the car's comfort and convenience, making it difficult to operate the windows.
  • Clear Coat Failure: The 1991 Grand Marquis has a reported problem of clear coat failure. This issue can cause the car's paint to fade and chip, leading to a less appealing appearance.
  • Premature Rust Failure: The 1991 Grand Marquis has a reported problem of premature rust failure. This issue can compromise the car's structural integrity, making it potentially unsafe to drive.
  • Air Bag Light: The 1991 Grand Marquis has a reported problem of the air bag light flashing. This issue can indicate a problem with the car's air bag system, potentially compromising the car's safety features.
  • Passenger Side Floor in the Rear Gets Soaked When It Rains: The 1991 Grand Marquis has a reported problem of the passenger side floor in the rear getting soaked when it rains. This issue can compromise the car's comfort and convenience, making it difficult to drive in wet weather.

In conclusion, the 1991 Mercury Grand Marquis has several common problems that owners have reported, including intake manifold failure, headlights not working properly, transmission failure, poor acceleration, fuel injectors stopping work, engine running hot, surges, coolant evaporation, poor fuel efficiency, windows not working, clear coat failure, premature rust failure, air bag light, and passenger side floor in the rear getting soaked when it rains. These issues can compromise the car's performance, safety, and comfort, making it essential for owners to address them promptly to ensure the car's longevity and reliability.

1991 Mercury Marquis engine

How much is a 1991 Mercury Marquis worth?

The value of a used 1991 Mercury Capri ranges from $2,761 to $6,785, based on vehicle condition, mileage, and options.

How many miles does a Mercury Marquis last?

Well taken care of Mercury Grand Marquis and the very similar Ford Crown Vics and Lincoln Town Cars have frequently gone 300,000+ miles.

Do Grand Marquis have transmission problems?

Problem Description

Transmission problems are common in this model, often as a result of a failed front pump.

Why did they stop making Mercury Marquis?

As Ford Motor Company expanded its use of front-wheel drive, the Marquis ended production after the 1986 model year, replaced by the Mercury Sable (the Mercury counterpart of the Ford Taurus). As the Grand Marquis, the nameplate continued on until the closure of Mercury during the 2011 model year.

How much is a 1991 Mercury Marquis worth?

The value of a used 1991 Mercury Capri ranges from $2,761 to $6,785, based on vehicle condition, mileage, and options.

Why did they stop making Mercury Marquis?

As Ford Motor Company expanded its use of front-wheel drive, the Marquis ended production after the 1986 model year, replaced by the Mercury Sable (the Mercury counterpart of the Ford Taurus).

Do Grand Marquis have transmission problems?

Problem Description

Transmission problems are common in this model, often as a result of a failed front pump.

How long does a Mercury Grand Marquis last?

Grand Marquis drivers typically report a minimum lifespan of around 200,000 miles before the more expensive repairs start to add up. That's not a terrible life expectancy, but these cars frequently hit the market with more than 150,000 miles on the odometer, so shop around for low mileage.

1991 Mercury Marquis car problems categorized by type of issue

After analyzing all complaints sent to the NHTSA and researching popular Mercury Marquis problems, we found that the most common problems with these 2023 model year vehicles are:

  • Electrical system problems
  • Vehicle speed control problems
  • Service brakes problems
  • Hydraulic problems
  • Air bags problems

The graph below shows statistics for all 1991 Mercury Marquis vehicle components and the number of complaints received.

1991 Mercury Marquis complaints

The NHTSA has received 9 complaints about various vehicle components related to the 1991 Mercury Marquis.

2004-04-30

ELECTRICAL SYSTEM PROBLEM

  • Date Of Incident: 2004-04-23
  • Fire: 1
  • Components: ELECTRICAL SYSTEM
  • Summary: WHILE VEHICLE WAS PARKED, IT CAUGHT ON FIRE WITHOUT WARNING. THE FIRE DEPARTMENT EXTINGUISHED THE FIRE, AND VEHICLE WAS TOWED TO THE DEALER FOR INSPECTION. THE CAUSE HAS NOT BEEN DETERMINED AT THIS TIME. *LA
2003-03-11

AIR BAGS PROBLEM

  • Date Of Incident: 2003-03-07
  • Number Of Injuries: 1
  • VIN: 2MECM75F2MX
  • Components: AIR BAGS
  • Summary: THE DRIVER SIDE AIR BAG DEPLOYED WITHOUT IMPACT AND CAUSED INJURIES TO THE CONSUMER.*JB THE DRIVER SIDE AIR BAG DEPLOYED WITHOUT IMPACT AND CAUSED INJURIES TO THE CONSUMER. *MR
1999-03-12

VEHICLE SPEED CONTROL PROBLEM

  • Date Of Incident: 1999-02-05
  • VIN: 2MECM75F0MX
  • Components: VEHICLE SPEED CONTROL
  • Summary: WHILE VEHICLE WAS PARKED IN DRIVEWAY CONSUMER CHANGED GEAR TO REVERSE AND VEHICLE ACCELERATED FOR UNKNOWN REASON. DEALER/ MANUFACTURER WERE NOT NOTIFIED AT THIS TIME. SEEKING HELP IN THIS MATTER FORM NHTSA . ALSO VEHICLE IS EQUIPPED WITH CRUSIE CONTROL. *AK
1999-02-20

SERVICE BRAKES, HYDRAULIC PROBLEM

  • Date Of Incident: 1999-02-12
  • VIN: 2MECM75F2MX
  • Components: SERVICE BRAKES, HYDRAULIC
  • Summary: REAR BRAKE LINE PUNCTURED DUE TO CONTACT WITH OR AGAINST BODY WELD SEAM DIRECTLY UNDER MASTER CYLINDER NEAR FOOT WELL. *AK
1998-06-03

VEHICLE SPEED CONTROL PROBLEM

  • Date Of Incident: 1995-11-05
  • Number Of Injuries: 1
  • Components: VEHICLE SPEED CONTROL
  • Summary: ACCELERATOR CABLE JAMMED, CAUSING THREE CASES OF SUDDEN ACCELERATION/LOSS OF CONTROL/ACCIDENT/INJURY.
1997-12-16

ELECTRICAL SYSTEM PROBLEM

  • Date Of Incident: 1997-11-16
  • Fire: 1
  • Components: ELECTRICAL SYSTEM
  • Summary: THE VEHICLE WAS PARKED OUT IN FRONT OF THE HOUSE AND NEIGHBOR NOTICED THAT SMOKE WAS COMING FROM UNDERNEATH THE HOOD OF THE VEHCILE, RAISED THE HOOD UP AND EVERYTHING HAD BURNED UP UNDER THE HOOD. VEHICLE WAS TOWED TO A DEALER, WAS TOLD THAT THE ALTERNATOR HAD CAUSED THE FIRE. *AK
1996-10-07

STEERING,SEATS PROBLEM

  • Date Of Incident: 1996-08-26
  • Number Of Injuries: 1
  • Crash: 1
  • VIN: 2MECM75F3MX
  • Components: STEERING,SEATS
  • Summary: DIRIVNG AT SPEED 30MPH, TRIED TO MAKE A RIGHT TURN STEERING WHEEL LOCKED UP, CAUSING THE VEHICLE TO ROLL OVER. *AK CONSUMER STATES THE SEAT BROKE IN THE ACCIDENT, HOWEVER SEATBELT HELD HER IN, CONSUMER WAS INJURED IN ACCIDENT. *SLC
1996-07-02

ELECTRICAL SYSTEM PROBLEM

  • Date Of Incident: 1995-08-15
  • Fire: 1
  • VIN: 2MECM74F7MX
  • Components: ELECTRICAL SYSTEM
  • Summary: ALTERNATOR BURNED OUT, CAUSED STALLING AND LOSS OF POWER STEERING. *AK
1995-11-07

SERVICE BRAKES, HYDRAULIC PROBLEM

  • Date Of Incident: 2024-11-24
  • VIN: 2MECM75F0MX
  • Components: SERVICE BRAKES, HYDRAULIC
  • Summary: BRAKING PROBLEMS. TT THE VEHICLE ACCELERATED DID NOT STOP WHEN BRAKES WERE APPLIED. THE DEALER REPAIRED THE VEHICLE BUT CONSUMER WAS NOT CONFIDENT IT WOULD NOT HAPPEN AGAIN. *YH
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Additional sources

More sources of information about 1991 Mercury Marquis problems:

1991 Mercury Grand Marquis Problems and Complaints - 6 Issues
1991 Mercury Grand Marquis Problems and Complaints - 6 Issues
https://repairpal.com/1991-mercury-grand-marquis/problems

Top 1991 Mercury Grand Marquis Problems · Intake Manifold May Crack Leaking Coolant Behind the Alternator · Spring in Seat Belt Buckle May Fail · Throttle ...

Idle is driving me nuts - 1991 Grand Marquis | Box Tech | Crownvic.net
Idle is driving me nuts - 1991 Grand Marquis | Box Tech | Crownvic.net
https://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=2808706

Assuming it's not rolled up into a wad or rusted in two, NO CAR IS UNFIXABLE(esp a OBD I Ford)... Common problem is ECT sensor that is out of ...

1991 Mercury Grand Marquis - problem with my transmission
1991 Mercury Grand Marquis - problem with my transmission
https://repairpal.com/problem-with-my-tranny-206

Dec 12, 2010 ... This could be caused by low fluid level and could damage the transmission. If the fluid's full, clean and clear, I don't think the trans is shot ...

1999 MERCURY MARQUIS GS, ANY PROBLEMS? TO BUY ONE ...
1999 MERCURY MARQUIS GS, ANY PROBLEMS? TO BUY ONE ...
https://www.justanswer.com/mercury/1qbyt-1999-mercury-marquis-buy-one-wondered.html

Jan 16, 2009 ... I have had to rebuild a few of these, but not a common problem. Check the engine for leaks, there could be an issue of a broken intake manifold ...

Are grand marquis bad cars? : r/whatcarshouldIbuy
Are grand marquis bad cars? : r/whatcarshouldIbuy
https://www.reddit.com/r/whatcarshouldIbuy/comments/u5bpdq/are_grand_marquis_bad_cars/

Apr 17, 2022 ... Panther cars (Marquis/Marauder, Crown Vic/Interceptor, Town Car) are all known for being really solid cars, but they get worse MPG than an ...

Other years of Mercury Marquis

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Marquis 1992
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1991 Mercury Marquis photo