Curse control occasionally makes engine accelerate while and after brake applied while moving under 5 MPH and even while stopped with brake still applied. More than once a pedestrian was at risk in a crosswalk while vehicle stopped with brake still applied, then engine suddenly became near full throttle, requiring even stronger pressing of brake peddle. We took the car to dealer (henry day ford) who updated engine control rom; but same problem continued to exist. The dealer offered no warranty of repair or even acknowledgement of problem. We now drive with the cruse control and horn and ??? Cable disconnected near windshield washer reservoir.
1999 Mercury Mountaineer acceleration problems
11 complaints (7% of all complaints for this car). 3 crashes reported.
- owner complaints
- 11
- of this car's complaints
- 7%
- crashes
- 3
- recalls
- 3
Which part fails
- Accelerator pedal3
- Cruise control2
- Linkages1
- Cables1
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 Mountaineer acceleration problems in other years
Related recalls
Vehicle speed control
- What is wrong
- On certain pickup trucks, passenger vehicles, sport utility vehicles, and motor homes chassis, the speed control deactivation switch may, under certain conditions, leak internally and then overheat, smoke, or burn.
- Risk
- This could result in an underhood fire.
- Remedy
- Dealers will install a fused wiring harness. Owners of the passenger cars included in this campaign will be instructed to return their vehicles to their dealers to have the speed control deactivation switch disconnected as an interim repair. As soon as repair parts are available (expected october 2007), owners will be instructed to return to the dealers for installation of a fused wiring harness. The recall began on august 13, 2007, and mailing completed by september 19, 2007. Owners may contact ford at 1‑888‑222‑2751.
Recall number 07V336000 · Recall details
Vehicle speed control: cables
- What is wrong
- On certain sport utility vehicles equipped with speed control and 4.0l sohc engines, if the strand cover on the speed control cable becomes flared at the end, the speed control cable may bind when the speed control is activated.
- Risk
- The throttle return spring force may not be sufficient to overcome the binding condition when the speed control is disengaged. Braking function would be maintained though stopping distances may be increased.
- Remedy
- Dealers will inspect the speed control cable and, if necessary, replace it. Owner notification began august 29, 2003. Owners should contact ford at 1‑800‑392‑3673.
Recall number 03V280000 · Recall details
Vehicle speed control
- What is wrong
- Vehicle description: certain 1997-1999 rhd explorer equipped with 4.0l ohv/sohc engines and cruise control built from may 29, 1996 through march 4, 1999; 1998-1999 explorer/mountaineers equipped with 4.0l ohv/sohc or 5.0l engines or 1998-1999 rangers equipped with 2.5l, 3.0l ffv/efi or 4.0l engines and cruise control built from january 5, 1998 through march 4, 1999; 1998-1999 mustangs equipped with 3.8l, 4.6l 2-valve or 4-valve engines and cruise control built from march 2, 1998 through march 4, 1999; 1999 f250/f350/f450/f550 (over 8,500 lbs.) trucks equipped with 5.4l or 6.8l engines and cruise control built from march 2, 1998 through march 4, 1999; and 1999 f-53 stripped chassis equipped with 5.4l or 6.8l engines and cruise control built from march 2, 1998 through march 4, 1999. A cruise control cable can interfere with the speed control servo pulley and not allow the throttle to return to idle when disengaging the cruise control.
- Risk
- If the cruise control is used and this condition is present, a stuck throttle could result, which could potentially result in a crash.
- Remedy
- Dealers will replace the cruise control cables. At the present time, the replacement cables are not available. Customers are being advised not to use the cruise control system until a replacement can be made.
Recall number 99V062001 · Recall details
What 1999 Mercury Mountaineer owners say
Most recent owner complaints, unedited.
Tl*the contact owns a 1999 mercury mountaineer. The contact received a recall notice for the vehicle speed control: cruise control switch in august of 2007. The parts for the recall repair are taking an extremely long time to arrive. He was dissatisfied that ford never provided their customers with updates and he had to call 8-10 times, more than once a month, to find out the status of the recall. The contact stated that his local dealer refused to deactivate the cruise control because they felt it was unnecessary. The dealer was located thirty miles away from his residence. There had been no failure to date. The current mileage was 75,000. Update 04-02-08
Tl*the contact owns a 1999 mercury mountaineer. He received recall notice 05s28 in september of 2006. The parts are not available. The vehicle speed control is not disconnected. The current mileage was 77000. There are no failures at this time. The VIN is not available.
Accelerated 1999 mercury mountaineer v8 from stop light. Throttle got stuck in accelerate position. Tried to free throttle by repeated pulsing with foot but acccelerator stuck in full throttle position and could not stop car! Had to turn off ignition resulting in no power steering or braking. Was able to free throttle by removcing throttle cover (on engine) and manually moving throttle by hand. Would have hit car in front of me if there was traffic! Throttle plate assembly replaced by authorized ford dealer at my cost.
While driving there was unattended acceleration. Consumer's foot actually was on the brake and at the accelerator pedal at the same time. The pedals were very close together. Accident occurred. Vehicle was totaled. Upon impact, the air bags did not deploy.*ak.....once off the exit ram slid through grass an dinto pine tree.
Tried to set cruise control and it would not hold speed set after 2 attempts, then it just "took off". Gas petal was all the way to the floor and I could not get it up. Could not shut off cruise control by braking or hitting "off" button. Was on expressway and going over 90. Had to fight gas petal all the way to the floor by braking. Fortunately I was on straight section of road and there was no ice and little traffic. I had to wait in car in 6 degree temp. For hr. And a half for aaa to load vehicle on flatbed to take to ford dealership. Unable to start engine b/c gas petal was still to the floor, so no way to keep warm. Ford dealership in mich. Disabled cruise control to allow me to continue to travel. Mercury dealership in toledo told me 2000 and 2001 mountaineers have been recalled for cruise control cable defect but when I called ford cust. Serv. They said they wouldn't do anything to fix the vehicle or reimburse for excess towing chg. Because there was no recall for 1999's. This is a serious safety issue and it could have been far more disastrous.
The cruise control was set at 65 MPH when all of a sudden the vehicle accelerated to 90 MPH. The dealer informed the consumer they would grease the throttle control cable, however the problem continued. The consumer stated there were two recalls on this issue.# 99-v-062-001 and 03-v-280-000.
Gas pedal sticks intermittently. Forcing pedal causes vehicle to surge/dealer check said no problem found at this time. Prior to taking to dealer I attempted lubrication in interior and under hood. Seemed to stop problem for 30 minutes to an hour, then intemittant sticking returned
While stopped at a red light with my foot on the brake pedal, the engine bucked and misfired as though it was going to die. Suddenly, the engine revved to the point that with both of my feet on the brake pedal, the car crept ahead and tapped the car ahead of me. Just as quickly as the engine surged, it dropped back in revs to normal idle. On my way home from the scene, it occured again, except this time I had my hand on the auto gear change, moved it qiuckly to neutral, and turned off the ignition. I made it home without further incident, called the dealer on monday , and had them tow the car to the dealership as I did not feel that the vehicle was safe to drive. After having the car for two days now, they claim that they can find nothing wrong. I told them that I would not accept the car back without a specific reason for this sudden acceleration. They say there is nothning wrong that they can find, but I will not drive this vehicle until a fix is located and repaired.
Vehicle accelerates suddenly, resultig in a collision that caused minor injuries . A recall has been issued . However, dealer has been notified.
Questions about the 1999 Mercury Mountaineer acceleration
Does the 1999 Mercury Mountaineer have acceleration problems?
Owners have filed 11 complaints about the acceleration of the 1999 Mercury Mountaineer, 7% of all its complaints.
At what mileage do 1999 Mercury Mountaineer acceleration problems start?
Not enough complaints include the mileage to tell.
Was there a recall on the 1999 Mercury Mountaineer acceleration?
Yes, 3 recalls: 07V336000, 03V280000, 99V062001. Check your VIN to see if your car still needs the free repair.
What year does the Mercury Mountaineer have the most acceleration problems?
The Mercury Mountaineer model years with the most acceleration complaints are 1997 (59 complaints), 1998 (36 complaints) and 2000 (28 complaints).
Other 1999 Mercury Mountaineer problems
Tires 51Visibility 22Airbags 14Engine 12Electrical 10Brakes 9Transmission 8Body 4Seats 4Steering 4Suspension 4Lights 3Fuel system 2Locks 2Seat belts 1Wheels 1
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