1977 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).

1977 Mercury Marquis

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Common 1977 Mercury Marquis problems

The 1977 Mercury Marquis is known for a few common problems, primarily related to its engine and electrical systems, based on complaints from owners of this car.

  • Fuel System Problems: A common cause of engine stalling in the 1977 Mercury Marquis is a faulty fuel system. This can include clogged or broken fuel lines, a clogged fuel filter, or a malfunctioning fuel pump. If the car suddenly stops getting fuel, it's essential to check these components to ensure they're functioning correctly. Additionally, the car's computer may prevent the fuel pump from operating if it detects rapid acceleration or deceleration, which can be resolved by resetting the system in the trunk.
  • Ignition System Issues: Ignition system problems can also cause engine stalling in the 1977 Mercury Marquis. This can include faulty spark plugs, ignition coils, or distributors. In some cases, the problem may be caused by a timing chain issue, which can lead to engine misfiring and stalling.
  • Cooling System Problems: Cooling system problems can also contribute to engine stalling in the 1977 Mercury Marquis. If the cooling system is not functioning correctly, it can cause the engine to overheat, leading to stalling. This is particularly common in older vehicles, which may have worn-out timing chains or other components that can cause cooling system issues.
  • Electrical System Problems: The 1977 Mercury Marquis is also known for electrical system problems, particularly related to its headlights. The headlights may become dim, come on intermittently, fail to shut off, or stop working altogether. This can be caused by a faulty automatic headlamp switch, relay, sensor, or control module. In some cases, professional scanning equipment may be required to diagnose the issue.
  • Power Window Mechanism: Another common problem with the 1977 Mercury Marquis is related to the power window mechanism, particularly in the tailgate window of the Colony Park wagon. The glass may not have enough torque to go up, and the gears may back drive once up. Access to the mechanism is near impossible, making repairs challenging.

In summary, the 1977 Mercury Marquis is known for several common problems, primarily related to its engine and electrical systems. These issues can include engine stalling, fuel system problems, ignition system issues, cooling system problems, electrical system problems, and power window mechanism issues. If you're experiencing any of these problems with your 1977 Mercury Marquis, it's essential to diagnose and address the issue promptly to ensure the safe and reliable operation of your vehicle.

1977 Mercury Marquis engine

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.

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.

Do Grand Marquis have transmission problems?

Problem Description

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

What kind of engine does a Mercury Marquis have?

4.6 L Modular V8

Powertrain. The third-generation Grand Marquis retained the same powertrain as the 1995-1997 Grand Marquis, with a 4.6 L Modular V8 and a four-speed 4R70W automatic transmission.

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).

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.

What kind of engine does a Mercury Marquis have?

4.6 L Modular V8

Powertrain. The third-generation Grand Marquis retained the same powertrain as the 1995-1997 Grand Marquis, with a 4.6 L Modular V8 and a four-speed 4R70W automatic transmission.

1977 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:

  • Service brakes problems
  • Hydraulic problems

The graph below shows statistics for all 1977 Mercury Marquis vehicle components and the number of complaints received.

1977 Mercury Marquis complaints

The NHTSA has received 1 complaints about various vehicle components related to the 1977 Mercury Marquis.

1996-02-14

SERVICE BRAKES, HYDRAULIC PROBLEM

  • Date Of Incident: 1996-01-21
  • Crash: 1
  • Components: SERVICE BRAKES, HYDRAULIC
  • Summary: BRAKE FAILED, CAUSING ACCIDENT/LOSS OF CONTROL.(OHIO STATE POLICE REPORT) *SD

1977 Mercury Marquis recalls

The National Highway Traffic Safety Administration (NHTSA) has issued 1 recalls for different components of the 1977 Mercury Marquis.

1977-09-13
  • Manufacturer: FORD MOTOR COMPANY
  • Components: POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT
  • Summary: THE INVOLVED VEHICLES WERE FITTED WITH TILT STEERING COLUMNS CONTAINING TRANSMISSION CONTROL INSERTS INTENDED FOR TRUCKS RATHER THAN PASSENGER VEHICLES. THIS MAY CAUSE THE TRANSMISSION SELECTOR POINTER TO BE MISALIGNED AND THE POSSIBILITY OF STARTING THE ENGINE WHEN THE SELECTOR IS BETWEEN THE NEUTRAL (N) AND DRIVE (D) DETENTS AND THE TRANSMISSION IS IN DRIVE.
  • Remedy: DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE TRANSMISSION SHIFT CONTROL INSERT, WITHOUT CHARGE TO OWNER.
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Additional sources

More sources of information about 1977 Mercury Marquis problems:

Mercury Marquis Questions - problem with a 73 marquis stalling ...
Mercury Marquis Questions - problem with a 73 marquis stalling ...
https://www.cargurus.com/Cars/Discussion-c15938_ds1099338

Apr 8, 2020 ... problem with a 73 marquis stalling - hey guys! i have a 1973 mercury marquis 460 sedan. now the when I take the car for a ride after about 5 ...

Grand Marquis front end squeaks! | Ford Forums
Grand Marquis front end squeaks! | Ford Forums
https://www.fordforums.com/threads/grand-marquis-front-end-squeaks.176857/

Oct 23, 2011 ... I'm sure that this is a common problem, since nothing is made to last anymore! ... 2000 Mercury Grand Marquis LS (Mauarder "Clone") NEW! 1968 ...

Q&A: 1977 Mercury Grand Marquis Headlight Covers - Stay or ...
Q&A: 1977 Mercury Grand Marquis Headlight Covers - Stay or ...
https://www.justanswer.com/classic-cars/354nd-headlight-covers-1977-mercury-grand-marquis-stay.html

Feb 14, 2010 ... One of the concerns that caught attention was the manner in which the 1966 Buick Riviera headlights rotated into position. On this particular ...

Transmission problems in a Mercury Grand Marquis : r ...
Transmission problems in a Mercury Grand Marquis : r ...
https://www.reddit.com/r/MechanicAdvice/comments/1gmbob/transmission_problems_in_a_mercury_grand_marquis/

Jun 18, 2013 ... A common problem on 4R70W transmissions is the main harness fills with trans fluid. That then causes problems. Engine misfires can also be ...

1973 Lincoln Continental / Ford LTD reliability and longevity. | Bob Is ...
1973 Lincoln Continental / Ford LTD reliability and longevity. | Bob Is ...
https://bobistheoilguy.com/forums/threads/1973-lincoln-continental-ford-ltd-reliability-and-longevity.361499/

Nov 1, 2022 ... 1977 Grand Marquis 460ci Sedan - 90K 1978 ... Are oil leaks common now due to the age of the engine seals. ... What would be the common problems I ...

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