1986 Mercury Marquis problems
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).
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Common 1986 Mercury Marquis problems
The 1986 Mercury Marquis is known for several common problems that car owners have reported over the years. These issues range from engine and electrical problems to fuel system and cooling system concerns.
One of the most common problems with the 1986 Mercury Marquis is poor acceleration, which has been reported by several car owners. This issue can be caused by various factors, including faulty fuel injectors, dirty throttle bodies, or worn-out spark plugs. In some cases, poor acceleration can also be a sign of a more serious problem, such as a clogged catalytic converter or a malfunctioning mass air flow sensor.
Another common problem with the 1986 Mercury Marquis is a burning oil smell, which has been reported by some car owners. This issue can be caused by several factors, including worn-out piston rings, damaged cylinder walls, or a leaking oil pan. In some cases, a burning oil smell can also be a sign of a more serious problem, such as a blown head gasket or a damaged engine block.
The 1986 Mercury Marquis is also known for experiencing fuel injector problems, with several car owners reporting that their fuel injectors have stopped working. This issue can be caused by various factors, including dirty fuel injectors, faulty fuel pressure regulators, or clogged fuel filters. In some cases, fuel injector problems can also be a sign of a more serious problem, such as a faulty fuel pump or a malfunctioning engine control module.
Another common problem with the 1986 Mercury Marquis is running hot, which has been reported by some car owners. This issue can be caused by several factors, including a malfunctioning thermostat, a damaged water pump, or a clogged radiator. In some cases, running hot can also be a sign of a more serious problem, such as a blown head gasket or a damaged engine block.
The 1986 Mercury Marquis is also known for experiencing surges, which has been reported by some car owners. This issue can be caused by various factors, including faulty ignition coils, damaged spark plug wires, or a malfunctioning engine control module. In some cases, surges can also be a sign of a more serious problem, such as a faulty fuel pump or a clogged fuel filter.
Finally, the 1986 Mercury Marquis is also known for experiencing car shut-off problems at idle, which has been reported by some car owners. This issue can be caused by several factors, including a malfunctioning idle air control valve, a faulty throttle position sensor, or a clogged air filter. In some cases, car shut-off problems at idle can also be a sign of a more serious problem, such as a faulty engine control module or a malfunctioning crankshaft position sensor.
In summary, the 1986 Mercury Marquis is known for several common problems, including poor acceleration, burning oil smell, fuel injector problems, running hot, surges, and car shut-off problems at idle. These issues can be caused by various factors, including faulty engine components, electrical problems, and fuel system concerns. If you own a 1986 Mercury Marquis and are experiencing any of these problems, it is recommended that you take your car to a certified mechanic for a thorough inspection and repair.
How many miles can you get out of a Mercury Marquis?
200,000 miles
They will go 200,000 miles easily .
What is the life expectancy of a Mercury Grand Marquis?
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.
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 many miles per gallon does a Mercury Marquis get?
Fuel Economy
| City | 15 mpg |
|---|---|
| Highway | 23 mpg |
| Combined | 18 mpg |
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).
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.
1986 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:
- Fuel system problems
- Gasoline problems
- Wheels problems
- Electrical system problems
- Vehicle speed control problems
The graph below shows statistics for all 1986 Mercury Marquis vehicle components and the number of complaints received.
1986 Mercury Marquis complaints
The NHTSA has received 4 complaints about various vehicle components related to the 1986 Mercury Marquis.
FUEL SYSTEM, GASOLINE PROBLEM
- Date Of Incident: 1999-06-06
- Components: FUEL SYSTEM, GASOLINE
- Summary: WHY ARE THE GAS TANKS ROTTING OUT WHEN YEARS AGO GAS TANKS LASTED A LIFETIME AND MORE. EITHER THE GAS HAS AN ADDATIVE THAT IS DOING IT OR THE MFGS' OF GAS TANKS ARE USING POOR QUALITY MATERIALS. THESE LEAKS START AS PIN HOLES AND THEN GROW SO MILLIONS COULD BE DUMPING GASOLINE ALL OF OUR ROADS THAT IS FINDING ITS WAY INTO OUR AIR AND WATER. THIS PROBLEM IS AS SERIOUS AS THE GAS STATION TANKS OF YEARS AGO AND FOR SOME REASON IT IS GOING BY UNNOTICED. I WOULD LIKE A RESPONSE TO THIS COMPLAINT. MY COMPLAINT HAS ALSO BEEN REPORTED TO THE EPA. *AK
WHEELS PROBLEM
- Date Of Incident: 1996-11-25
- Components: WHEELS
- Summary: LEFT REAR WHEEL CAME OFF, CAUSING ACCIDENT. (OHIO STATE POLICE REPORT)
ELECTRICAL SYSTEM PROBLEM
- Date Of Incident: 1996-01-01
- VIN: 2MEBP95F4GX
- Components: ELECTRICAL SYSTEM
- Summary: ELECTRICAL SHORT, CONTINUES TO BLOW FUSES. TT
VEHICLE SPEED CONTROL PROBLEM
- Date Of Incident: 1996-01-18
- Components: VEHICLE SPEED CONTROL
- Summary: WHILE DRIVING ON ICY PAVEMENT VEHICLE ACCELERATED WIDE OPEN FOR NO APPARENT REASON. HAD TO TURN OFF IGNITION TO STOP VEHICLE. PLEASE DESCRIBE DETAILS. TT
1986 Mercury Marquis recalls
The National Highway Traffic Safety Administration (NHTSA) has issued 1 recalls for different components of the 1986 Mercury Marquis.
- Manufacturer: FEDERAL-MOGUL CORPORATION
- Components: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
- Summary: CERTAIN FEDERAL-MOGUL AFTERMARKET FUEL PUMPS SOLD UNDER THE BRAND NAMES OF CARTER, ACCUFLOW, NAPA, TRUFLOW, PARTS DEPO, AND PARTS MASTER, SHIPPED BETWEEN AUGUST 2006 AND JULY 2007 FOR USE ON THE VEHICLES LISTED ABOVE. THE FUEL PUMP DIAPHRAGM IN CERTAIN PRODUCTION RUNS MAY HAVE BEEN IMPROPERLY INSTALLED OR INADEQUATELY TESTED WHICH MAY CAUSE THE FUEL PUMP TO LEAK.
- Consequence: A LEAKING FUEL PUMP COULD CREATE A VEHICLE FIRE HAZARD.
- Remedy: FEDERAL-MOGUL WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE FUEL PUMPS FREE OF CHARGE. THE RECALL BEGAN ON OCTOBER 15, 2007. OWNERS CAN CONTACT FEDERAL-MOGUL AT 248-354-7700.
Additional sources
More sources of information about 1986 Mercury Marquis problems:
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