2000 Mercury Grand Marquis engine problems

25 complaints (15% of all complaints for this car). Typical mileage when it fails: 87,000.

owner complaints: 25
of this car's complaints: 15%
typical mileage: 87,000
crashes: 0
recalls: 0

Which part fails

Engine
4
Exhaust system: manifold/header/muffler/tail pipe
3
Engine: gasoline
2
Exhaust system
1

At what mileage

Complaints by mileage at the time of the problem.

0k-25k

25k-50k

50k-75k

75k-100k

100k-125k

125k-150k

150k-175k

175k-200k

200k+

Mercury Grand Marquis engine problems in other years

Related recalls

No recalls on record for this model year.

Related investigations

Spark plug ejection from cylinder headOpened September 22, 2005, closed January 4, 2006

On september 6, 2005, odi received a petition requesting that the agency investigate allegations of engine spark plug ejection in certain model year 1997 through 2004 ford vehicles with triton v-8 and v-10 engines.odi received a total of 474 non-duplicative complaints on the subject vehicles where the complainant, or the dealer repairing the vehicle, reported that a spark plug detached from the cylinder and/or ejected from the engine.as of december 8, 2005, odi is not aware of any allegations where the alleged defect resulted in a loss of vehicle control, a crash, an injury, or a fatality in any of the 10,319,810 subject vehicles.in addition, odi is aware of only two incidents where the vehicle stalled without restart.information contained in the odi consumer complaints and obtained from 72 telephone interviews with complainants showed the following:(1) 99% of the complaints were on my 1997 to 2002 subject vehicles.(2) most the complainants reported hearing a loud pop while driving or upon starting up the vehicle followed by a loud, repetitive clicking or popping sound.(3) many of the complainants reported that the popping sound was accompanied by some loss of vehicle power; however, in 99% of the incidents reported, the vehicle did not stall.in the very few incidents where the vehicle did stall, most vehicles could be restarted.(4) only a small percentage of the complainants cited that they smelled gas or a slight burning smell when the incident occurred.(5) in all but a very few incidents, vehicle damage was limited to the engine.in one incident, the complaint reported that the fuel rail was damaged and replaced after one of the spark plugs ejected from the engine; however, the complainant reported that the damage did not result in any type of fuel leak or fire.in another incident, the only incident where a fire was alleged, the complainant reported that no fluid leak was observed, but that a fire resulted after the spark plug had ejected from the engine and he had restarted the vehicle and driven to another location.none of the complainants reported any damage to the vehicle hood.(6) only two complainants reported that they observed what appeared to be some drops of fuel coming from the cylinder where the spark plug had failed or on the spark plug itself; however, each of these complainants reported that there was no smoke or flames as a result of his incident.as the petitioner noted, and odi?s analysis showed, it is possible for a spark plug to detach from the engine cylinder threads in the subject vehicles.however, odi?s analysis of 474 complaints describing such incidents found only a very few alleged any safety-related consequences.none of these showed any evidence of a serious safety consequence.given the large population and relatively long exposure time of the subject vehicles, the complaint analysis indicates that the risk to motor vehicle safety from the alleged defect is very low.in view of the foregoing, it is unlikely that the federal safety agency would issue an order for the notification and remedy of the alleged defect at the conclusion of the investigation requested in the petition.therefore, in view of the need to allocate and prioritize the federal safety agency?s limited resources to best accomplish the agency?s safety mission, the petition is denied.

DP05005

What 2000 Mercury Grand Marquis owners say

Most recent owner complaints, unedited.

Filed Jun 15, 2023 · Driver assistance, Engine · TX

Unknown

Filed Nov 5, 2020 · Brakes, Engine · TX

Air leak in intake manifold or egr or PCM system cylinder 3 misfire dirty fuel injection

Filed Oct 22, 2020 · Engine · VA

The intake manifold is crack

Filed May 28, 2019 · Acceleration, Engine · 118,000 miles · FL

Tl* the contact owns a 2000 mercury grand marquis. While driving various speeds, the vehicle hesitated to accelerate. The failure occurred most frequently when traveling up hill. The failure was intermittent and the check engine warning indicator illuminated. The dealer was not notified. The vehicle was not diagnosed or repaired. The contact sprayed carburetor fluid on the intake manifold and noticed a crack. The manufacturer was made aware of the failure. The failure mileage was 118,000.

Filed Apr 24, 2018 · Engine · 43,000 miles · CT

I believe this issue effects millions of ford and mercury vehicles, many of which are taxi, government, and police cars. Apparently, the computer (PCM) that controls the engine can shut the engine down while the vehicle is driving when certain sensors fail (at least 2 known sensors per my research). I found this out at 65 MPH, 2 hours from home. I was told by the dealer that there are no new pcms made for my 2000 car, and that I had to rely on a rebuilt after market PCM. The aftermarket seller related that these computers last approximately 10 years. Even if I replace this part, I believe this effectively makes my (and any such) car a risk to drive, as most rebuilt auto parts are created by simply replacing any failed components out of the many components in the assembly of the part, and leaving others still old and worn. When would the other parts fail, and if the car is operating is a high risk unknown. On top of the fact that this creates a spectacular hazard to motorists, I don't think that's fair to consumers. I can demonstrate what this car does, and go over the oem factory manuals where they cite "replace the PCM". Also, why do these sensors fail to a very unsafe condition, have no logic check (such as testing other sensors to see if they concur before an engine shut down) and why can't they be disconnected to allow the engine to keep working till you can get to the repair?

Filed Mar 23, 2015 · Engine · 105,000 miles · NY

A spark was blown out of the cylinder head. The problem occurred 3 times (2010, 2014, 2014), each time a different cylinder. One of these times, it occurred to my wife 140 km away from home. I had to guess that it was a blown spark plug and instructed her to drive the car to toronto in this condition. Concern: aside from the costly repair, I am afraid to use the car on a long trip for fear that this will happen at a place where a repair is not available. I suspect that the ford company has modified the engine along the way, considering the fact that on a previous model I had owned for a long time (1993 grand marquis), the problem had never occurred.

Filed Mar 22, 2014 · Engine · 71,290 miles · FL

While replacing the thermostat, a crack developed in the plastic crossover channel in the plastic intake manifold allowing the engine coolant to leak when the thermostat opened. Ford knows this to be defective and has replaced the all plastic manifold with an aluminum crossover for the coolant. The vehicle has 71,290 miles.

Filed Mar 20, 2014 · Engine · 50,000 miles · NY

Tl* the contact owns a 2000 mercury grand marquis. The contact stated that the thermostat was leaking. The thermostat was replaced however, the intake manifold failed and fell into the thermostat after the replacement. Additionally, there was a leak in the sensor coolant temperature sensor area which was repaired with a sealing solution and the thermostat was replaced because the plastic inside the intake manifold was deteriorated. The defect was not repaired or diagnosed. The current mileage was 170,000. The approximate failure mileage was 50,000.

Filed Apr 12, 2013 · Engine · 132,208 miles · AL

Tl* the contact owns a 2000 mercury grand marquis. The contact stated that the vehicle overheated while driving 35 MPH. The contact noticed fluid leaking from underneath the vehicle. The contact took the vehicle to a local mechanic where it was found that there was a coolant leak. The mechanic stated that there were three cracks on the intake manifold. The mechanic replaced the intake manifold. The failure mileage was 132, 208. Updated 05/29/13*lj updated 06/13/2013

Filed Sep 16, 2012 · Body, Engine · 78,000 miles · OK

Paint is peeling, like there was never a primer put on the vehicle. Also the vehicle surges quite often. I have replaced the manifold spark plugs several times also coils. Is there a recall on mercurys paint that I can get some help with?

Questions about the 2000 Mercury Grand Marquis engine

Does the 2000 Mercury Grand Marquis have engine problems?

Owners have filed 25 complaints about the engine of the 2000 Mercury Grand Marquis, 15% of all its complaints, more than any other problem.

At what mileage do 2000 Mercury Grand Marquis engine problems start?

The typical (median) mileage in owner complaints is 87,000 miles.

Was there a recall on the 2000 Mercury Grand Marquis engine?

There is no recall for this problem on this model year.

What year does the Mercury Grand Marquis have bad engine?

The Mercury Grand Marquis model years with the most engine complaints are 1997 (126 complaints), 1996 (86 complaints) and 1999 (33 complaints).