Other Fuel System Problems of Mercury Grand Marquis

Head lights suddenly went out while driving at night causing near accident, happening frequently. Also, the gas tank leaks when I put gas in car, making it smell badly and making it dangerous if someone drops a cigarette near it.

See all problems of the 2003 Mercury Grand Marquis 🔎.

?yrs. Ago while backing out of parking space at calaveras lumber, after shifting into reverse, & removing my foot from the brake; the engine appeared to receive a huge burst of fuel which shot me backward like a rocket slamming my vehicle into and wedging it under the frame of a pickup truck parked in the same lot. I am glad I was parked and had my foot on the brake prior to this unit or system malfunction otherwise the injuries could easily have been fatal on the highway. I think this defect may be a contributing factor to the car dying recently while on my way to a wedding reception in roseville, which left me stranded after dark for 41/2hrs and 71/2hrs. 2days later. I have not been able to start vehicle since and mechanics unable to diagnose why the engine is fuel starved when system parts tested appear to be in good working order. Something seems to be shutting off power or preventing power to the fuel pump and it is not the inertia switch, relays, fuses etc. . Components have been previously inspected by numerous others including dealer. No recognizable alert/warning prior to incidents!.

See all problems of the 2002 Mercury Grand Marquis 🔎.

While driving, I came to a stop light and suddenly, the car idled high and lurched forward while my foot was on the brake, luckily, I was stopped well away from the vehicle in front of me. The car idled high and seemed to have a mind of it's own. I took the back roads home and backed into our garage. The car smelled hot, and I though I had smoked my brakes, trying to keep control of it. Later that night, I told my husband about the car's actions and he did not believe me, though my daughter who was with me at the time confirmed that the car had indeed accelerated on it's own. My husband started the car and it did idle high and get hot once again, although only parked with no one in it. He thought he knew what the problem was and we turned off the car and closed the hood and went inside to order the part. A few minutes later, we heard a couple popping noises and I opened the door that led into the garage from the basement. Smoke was coming into the house and my husband said that a flame shot over my head. The car had caught on fire under the closed hood. We called the fire department, but by the time they arrived, a good portion of the basement was on fire. The house was a total loss. My husband though that the pvc elbow under the hood was sticking closed, so that is the part we were going to order. Unsure, if that was the real cause or not. The car did not have any warning lights or any other indications of a problem before this incident.

See all problems of the 2004 Mercury Grand Marquis 🔎.

A lot have happened still trying to figure out the problem it want crank now.

See all problems of the 2001 Mercury Grand Marquis 🔎.

The vehicle acceleration by it self and could not stop it. Propelled thru the. Brakes and would not stop. We are taking car to Ford dealer. The car engine was stopped and restarted run ok. Not sure if a recall about this yr. With this problem?.

See all problems of the 2006 Mercury Grand Marquis 🔎.

Cracked air intake manifold allowing it to over heat and messing up mass air flow sensor.

See all problems of the 1998 Mercury Grand Marquis 🔎.

Tl the contact owns a 2003 Mercury Grand Marquis. While driving at any speed, fuel spilled all over the engine without warning. There was no smoke present. The failure recurred several times. The vehicle was taken to an independent mechanic who placed o-rings in the fuel injectors, but the failure recurred. The vehicle was taken to hilbish Ford (704-938-3121, located at 2600 s cannon blvd, kannapolis, nc 28083) where the o-rings and the fuel injectors were replaced, but the failure recurred. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure mileage was approximately 92,500.

While entering onto the woodrow wilson bridge from I-295s on 2/1/2018, I pulled into the center lane and backed off the gas pedal, but the car continued to accelerate on its own. Luckily the traffic was light, after hitting the brake and the off button for the cruise control, to no effect, I was able to pull into the right lane and turn the car off. While still in motion, I turned the key back on and everything was normal again. Since it wasn't a cruise control issue, it would appear it is similar to the Toyota problem with the drive by wire issue.

The car has 87934 miles on it. When driving over 50 miles a hour it jerks and shakes the check emgine light will start flashing the coolant loght comes on then dies but will start right back up. Then coolant levels are fine. The license plate light does not work replaced bulbs and fuses.

I was driving at a speed of 45mph on a county road in rush hour traffic when my car's engine light came on simultaneously as power of vehicle slowed while making a rattle type noise and cab smelled strongly of gas. I rolled windows down pulled over within a block to a napa store. The employee told me they do not run diagnostics and I would have to take it somewhere. I drove slowly to a 2nd auto parts store 1 mile away to run diagnostics. Once done, diagnostics identified a miss-fire on spark plug #2. Had vehicle towed to home and took 'heli-coil' off and spark plug came out with it damaged. The heli coil was also damaged. The threads of spark plug was flattened three threads from bottom. Contacted auto parts store again where the technician told me that Ford has been having problems with there triton spark plugs blowing out on the 5. 4l engines that they only screw in 3 threads into the head of the engine and there were pending lawsuits. The next day I called Ford dealership and spoke with the acting service manager. "he told me there was nothing he could do about it and I should call customer care of Ford: 800-392-3673. I did and rep. Told me there was no recall and my vehicle and it was out of warranty at 101,100. Mi. There was nothing they could do. In the event there were to be a re-call to save my receipts and Ford would reimburse me. I read about the problems that multiple customers were or had had regarding the same problem with a few vehicles leaking gas with the problem. This is all happening when the cars, trucks and suvs exceeds 100,000miles. I feel this is not only poor manufacturing of an inferior aluminum casing and spark plug and also not enough threads to hold the spark plug in safely. To have it jump out allows gas to also be expelled onto the cars remaining parts and vapors could ignite causing the car to potentially catch fire.

Throttle body failure__ engine goes to dead idle at highway speeds, leaving the driver and passengers helpless to exit onto the breakdown lane or shoulder if you are not in the right hand lane when it happens, ie if you are on a 70 mph interstate in the center lane with vehicles passing you on both sides while you are helplessly coasting to a stop unable to remove yourself from the center lane, you would be subject to cause a chain reaction accident. Ford refused to fix this vehicle at their expense, and wanted to charge me $189 dollar fee to analyse the problem, when they already knew what was wrong,(according to the tech person I spoke with who said they have replaced hundreds of these defective parts) the part cost $543 dollars not including labor on a vehicle with 71 thousand miles on it. This is an extremely dangerous situation and should be recalled ASAP.

See all problems of the 2010 Mercury Grand Marquis 🔎.

The vehicle recently experienced two sudden acceleration events in two days 15 miles apart while decelerating and using the brake in what could only be related to an intermittent failure of the electronic throttle control. While on vacation during a 75 deg evening with the car at operating temperature I was navigating some s turns high on a bluff at 30mph. While coming into a corner with my foot on the brake and slowing to around 20mph the car suddenly accelerated. I hit the brakes hard, turned away from the corner to avoid going over the cliff and turned off the key. All this happened in less then 5 seconds. The next day mid afternoon after driving 20 miles I was leaving a park and traveling on a level straight road at around 25mph. Coming up to a stop sign I let off the gas and started applying the brake (like the day before) at about 15mph the car violently accelerated. I hit the brakes hard again, the rear tire started spinning and it pushed the car through the crosswalk past the stop sign and into oncoming traffic by about 4ft before I got the engine shut off. Once again this all happened in a matter of seconds. After a restart everything was normal again. I drove around 250 mi to get home without any further incident. Two weeks prior to these events I had the car at the dealer to program a new transponder key, reset the keyless entry and test the throttle to see if the initial deadband could be adjusted (no adjustment was done). After the incident I returned to the dealer and they said they have never heard of this problem, there are no recalls or tsbs, and the ecm would not datalog anything since there was no trouble light. They said there was nothing they could do. I consider this unsatisfactory, deem it a major safety defect and Ford should be required to correct this immediately. A quick search reveals I am not the only one who has experience this.

See all problems of the 2008 Mercury Grand Marquis 🔎.

Well I bought this car and it has recalls on it but know the Ford shop won't fix I thought it was free to get recalls fixed wow.

With only 30,000 miles, the fuel rail assembly corroded through, created a pin hole and sprayed fuel against the hood assembly and over the entire top of the engine. This occurred only 2 days after the vehicle had been repaired by Ford for the safety steering recall. The vehicle was repaired and mechanic mentioned that he has never seen this before and this assembly should not have corroded.

The contact owns a 2003 Mercury Grand Marquis. While driving approximately 40 mph, there was a fuel odor emitting from the vents. The failure occurred on numerous occasions. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 94,000.

On 6/1/14 I was driving south on sr44 in ohio near lake punderson and following a farmer driving a farm tractor. When I got a chance to pass him I accelerated to kick in the passing gear and when I cleared him and left off the throttle it did not respond instead it continued at a high speed for a few seconds before letting off. I thought maybe the throttle got caught on my car mat. I very rarely push the throttle to the floor. Then yesterday 8/20/14 I was with my family traveling north on I-77 in akron ohio and again I kicked the car into passing gear to pass and this time it accelerated and did not retract on my letting off. I slid the shifter into neutral and placed my foot under the pedal and lifted up and it came up but I thought I felt some resistance with the peddle. I continued on to my destination only a few miles to copley ohio. I parked the car turning off the engine and slid the seat back and on my knees in the driveway I reached in with my right hand and pushed the peddle all the way in and let go of it and to my surprise it remained in the full throttle position. I then pulled the throttle back and felt resistance. I pushed it back in again and it stuck but came back with with less resistance so I pumped it back and forth and got rid of the sticking problem. I then thought it may of developed some light rust on the linkage so I looked up under the dash and there is no place to lubricate thats when I realized I really had a problem and possibly a lot of people owning a similar car. As of this writing I went out to the car in the garage and reached in and pushed the throttle to the floor and it came back nicely. A lot of people will not react as I did and shift into neutral.

Tl- the contact owns a 2006 Mercury Grand Marquis. The contact stated that while in park, the contact noticed that the fuel straps had partially detached from the vehicle. The vehicle was taken to the dealer who diagnosed that the fuel straps had corroded and needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 90,000. Gl.

The contact owns a 1995 Mercury Grand Marquis. The contact stated that while decelerating from driving at 70 mph, a fuel odor emitted from the vehicle without warning. The contact mentioned that the failure recurred intermittently. The vehicle was taken to a dealer but was not diagnosed or repaired. The manufacturer was notified of the failure and the vehicle was previously serviced under NHTSA campaign number: 95v063000 (fuel system, gasoline). The failure mileage was 77,000.

I was driving on the interstate going about 65 mph. I accelerated rapidly to pass a semi when I was getting close to my exit. After passing the semi I let my foot off of the accelerator but the vehicle did not slow down. I applied the brake pedal but the vehicle kept accelerating for about 5 seconds. After that I heard an audible "clunk" come from the engine compartment and the vehicle returned to normal operation. This is the second time this has happened the first was a month ago accelerating rapidly from a stand still position. In neither case did I wreck or get a speeding ticket.

I was driving at 45 mph and applied the brake to stop. The engine revved to 2,000 rpm. I was able to stop with very hard braking using both feet. The engine continue revving at 2,000 rpm even after the car had stopped. I placed the transmission in neutral and the engine revved even faster. The engine did not slow down until until I turned off the ignition. After leaving the engine off for around two minutes, I restarted the engine and it resumed running at around 500 rpm. My 23 year old son was seated next to me and verrified that nothing was touching the accelerator while the engine was revving at 2,000 rpm and that both of my feet were on the brake. The engine has revved when I applied the brake at least seven other times; however, the revving stopped after one or two seconds. I have taken the car to a Ford dealer three times for this problem; however, they have not been able to find the cause of the problem.

See all problems of the 2009 Mercury Grand Marquis 🔎.

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?.

See all problems of the 2000 Mercury Grand Marquis 🔎.

My 2006 Grand Marquis original plastic intake manifold developed a crack at the drivers side rear intake bolt area causing it to leak antifreeze. This caused me to have to spend $240. 00 to buy a new dorman replacement and install it. Ford continues to use these cheap plastic manifolds despite losing a class action lawsuit against them for this problem. There will be more of these plastic manifold failing in the near future to be sure. This problem should be addressed by a new class action lawsuit due to fords continued incompetence as a manufacturer. My car also suffers from a defective eatc air conditioner control that blows air out of the wrong vents and won't activate the ac. Also a bolt broke on the drivers side front seat due to rust. Also the digital compass has quit working. Also had a water leak in the back passenger floor area.

During normal operation of my car, the check engine light came on and stayed on. I had the engine light codes read and it indicated that two cylinders were misfiring. I took the car to a service shop to have the spark plugs changed. I was told that the intake manifold had developed a crack which was allowing coolant fluid inside the manifold cavity and this is what was causing the cylinder misfire. The car is a 1999 Mercury Grand Marquis with a 4. 6 ltr. Engine. The intake manifold is made of a plastic material and tends to crack next to the thermostat housing. This is exactly where the intake manifold on my car cracked. I have since found out that the Ford motor CO. Issued a recall bulletin to their Ford and Lincoln Mercury dealers in December 2001 advising them of the defect. Subsequently, certain favored fleet owners of Mercury marquis and Ford crown victoria automobiles (police, limo and taxi companies) were notified of the recall. "civilian" owners were excluded. I owned my Mercury Grand Marquis at that time and was not notified of the recall. My exclusion from the recall notification resulted in my being exposed to the potential fire hazard of the cracked intake manifold, as well as the inconvenience and considerable expense of having to have the defective manifold replaced. Because of the selective recall that Ford motor CO. Made regarding defective intake manifold, a class action lawsuit was filed against Ford motor CO. On behalf of excluded owners and Ford motor CO. Had to make restitution to such owners. I was not a party to the lawsuit because I was not made aware of my status as a wronged owner. I would like to know why the nhtsb did not require that Ford motor CO. Notify me about the recall to replace the dangerous defective intake manifold on my car?.

See all problems of the 1999 Mercury Grand Marquis 🔎.

1999 Mercury Grand Marquis LS 4. 6l (1) drove vehicle in a normal way, commuting from home to work daily. No speeding. In the mornings properly wait for 10 minutes to warm up the vehicle's engine prior to driving. Kept proper maintenance schedule by Ford/Mercury dealership. Never brought up to my attention of the possible default this part may cause down the line. Had a complete coolant flush for radiator. Replaced with new coolant. (2) misfire in cylinders 6 + 2. Check engine light on. Small amounts of coolant leakage onto top part of engine, profusely around the spark plug chambers. Coolant come in contact with alternator affecting check battery light to go on. Vehicle showed signs of intense shaking at idle and at normal driving conditions within 1 hr after check engine light came on. Vehicle is a 199 Mercury Grand Marquis LS 4. 6l. Vehicle could not be driven w/o being extremely shaky while driving. Hesitation present. On cold days, small presence of coolant traces were found inside the spark-plug pits along side the ignition coils and at times small vapor came from inside the engine noticed from inside the driver's seat coming from inside the hood causing concern. . Read more...

Poor gas mileage.