Mercury Mariner adaptive cruise problems

Filed Jun 15, 2017 · Acceleration, Engine · 101,851 miles · AZ

The throttle is held open when the cruise control is employed but remains open when the cruise control is turned off both by using the off button and brake application. This happens at 75-80 MPH on interstate highways in az and ut. The power brake booster is ineffective with no intake vacuum. This is very dangerous.

Filed Apr 21, 2017 · Acceleration, Steering · 135,000 miles · TN

Tl* the contact owns a 2008 mercury mariner. The contact stated that while driving at various speeds, the cruise control malfunctioned as well as the rpms. The contact stated that the rpms were inconsistent with the actual speed of the vehicle and went up to 4000 rpms at various speeds. In addition, there was a loud clunking noise in the steering wheel and the contact stated that the vehicle downshifted on numerous occasions. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 135,000.

Filed Jan 1, 2017 · Acceleration, Fuel system · 72,300 miles · ND

My wife and I were driving home on the interstate. We had just merged to the passing lane to allow traffic merging from an on ramp to enter the interstate a vehicle next to us was doing the exact speed as we were which was 72 MPH set cruise control. I had vehicles approaching from the rear and since I was in the passing lane decided to speed up and get in front of the car beside us I pushed the accelerator on our 08 mercury mariner with a 3.0l engine to the floor and the car accelerated in front of the other car, when I lifted my foot off the accelerator the car continued to accelerate. I pushed on the brake once with nothing changing the car continued to accelerate. I proceeded to pump the brake three additional times in about 1 second intervals. Finally the accelerator pedal release and the car slowed down. We preceded home without further incident. This is a very dangerous condition and has resulted in serious injuries and deaths in earlier model years of ford escape, mercury mariner and mazda tribute vehicles. I have had ford vehicles my whole life and have been working on vehicles for more than thirty five years. This is not normal and is not the only time or vehicle this has happened to in this year there are many other similar people that have similar complaints on these ford and mercury SUV's on the internet ex: carcomplaints.com to name just one. The internet is filled with these dangerous complaints. When are you going to live up to your name and put the safety aspect first,when dealing with these to rich to be bothered by recalls auto manufacturers?

Filed Jul 20, 2015 · 67,000 miles · PA

Was using cruise control down the road doing 45 miles per hours. While on a straight stretch and going up slight hill car was fine. When I started to go down the slight hill car seemed to sound like it was in neural gear and my rmps jumped to between 3 and 4. I looked to see if some how the car got accidently shifted into neutral and it wasn't it was still in drive. So I turned the cruise control off and everything went back to driving and sounding normal. This is now the third time this has happened. We just purchased this car and of course limited warranty is now over and this is now happening. Was wondering if there was a recall on something like this or if maybe other people are having this problem also. Please let me know as I feel this is now a unsafe vehicle and I wish I would of know this was gonna happen before I shelled out 12,000 for it because now I don't want to drive it especially with my children or my newborn grandson in the vehicle with me.

Filed Mar 19, 2014 · Acceleration, Transmission · 59,000 miles · IN

Driving on highway with speed control on at 75 MPH, all of the sudden vehicle rapidly sped up to 95 MPH. The vehicle just took off raving engine up. Applied brakes and took off cruise control. If there had been traffic this could of been a dangerous or deadly incident. We have had the vehicle in before for the same problem, it would speed up while making a turn. Ford dealership said it was a transmission problem. All repairs have been done by a ford dealership.

Filed Nov 27, 2013 · Acceleration · 109,500 miles · AR

Traveling along with cruise control set at 65 when all of a sudden my vehicle decelerates. The "throttle body/throttle position switch" indicator light illuminated. Vehicle has had intermittently gone into "limp" since then. Lately it has happened at least once per day, often when trying to accelerate quickly or above 40mph. Check engine light illuminated yesterday (11/26/2013) and indicated a p2111 diagnostic code (throttle actuator stuck open). This is apparently a fairly common issue already under investigation. The solution seems to be have a dealer replace the throttle body (roughly $400 parts and labor).

Filed Oct 22, 2013 · Engine · 83,000 miles · OH

10/12/13 - traveling on highway with the cruise control set at 70mph the engine just shut off. I coasted to the side of the road, put it in park, waited a minute or two, then started the car. It ran without incident for 20 minutes until I reached home. 10/15/13 traveling on highway 60mph the engine just shut off. I shifted into neutral and tried to start it, but it would not respond. I coasted across two lanes of traffic to the side of the road, put it in park, waited a minute or two, then started the car. It ran without incident for 20 minutes until I reached home. 10/17/13 ford dealership could not find anything wrong with the vehicle. Nothing in the codes. Replaced the relay switch 10/18/13 traveling on market street in youngstown, ohio at a speed of 30mph the engine shut off. I coasted in to the center turn lane, put it in park, waited a minute and started the car. The vehicle is riding more rough and sputters now and then. Drove for 10 minutes in city traffic without incident 10/18/13 while driving 45mph in rural area the engine shut off. I pulled to the side of the road, put the car in park and started the engine. This was the first time I notice a yellow wrench light on in the lower left portion of my dashboard. Car rides rough and sputters a bit. After all these multiple incidents in a short period of time I refuse to drive the car. It is not safe to drive and is not dependable. The engine shuts off without warning at all speeds, but on the highway without warning is unacceptable.

Filed Sep 12, 2013 · Acceleration, Fuel system · 49,000 miles · NC

Traveling on 2 lane road at 55 MPH. Engine set at cruise control speed when power was lost. Vehicle felt like it was coasting, the accelerator would not work. I was able to coast to a stop on a side street, then had my vehicle towed to the dealer for repairs. I checked web sites last night and found this to be a recurring problem with ford escapes and mariners. Cost of repair was $382.37 and not covered for any reimbursement by ford/lincoln. Cutting off like this is extremely dangerous and places occupants at risk for serious injury.

Filed May 17, 2013 · Acceleration · 50,000 miles · FL

While I was driving on highway at 70mph - in cruise control, car suddenly starting losing speed. Tried to resume speed but was not able to accelerate, so I pulled over. While stopped, car started acting like it wanted to stall so I shut car off and had it towed to shop. Mechanic states they are getting a throttle body error.

Filed Apr 2, 2013 · Acceleration, Engine · WI

2010 mercury mariner. Consumer writes in regards to vehicle hesitation intermittently at various speeds. *smd the consumer stated she began noticing the problem in 2011, after a 2010 update of the transmission software in a factory recall. In addition to the hesitation when trying to accelerate, there were also a few instances where the cruise control seemed to either surge or back down, as if it didn't know quite how to respond, usually, but not always, when on a slight incline. The consumer stated on one occasion, when the vehicle was in park, with the motor idling, she was unable to get the vehicle to go into to gear on the first attempt, when it did shift, it shifted very hard and noisily into gear on the 2nd attempt. Also, the vehicle would shift rough in lower gears, typically from as top or accelerating after slowing to almost a stop. The consumer went to another dealer, after the dealer where she originally purchased the vehicle from, failed to address the problems she experiencing. The second dealer informed her, the transmission valve body was damaged even before the recall came out in 2012. The part was replaced. However, the consumer experienced a hesitation in january 2013. The consumer stated after reading about an investigation of ford vehicle, which included her model year, she was concerned about the throttle body, which had not been replaced.