Mercury Mountaineer stalling problems

Filed Sep 3, 2025 · Engine, Fuel system · 200,000 miles · AZ

The contact owns a 2008 Mercury Mountaineer. The contact stated that the check engine warning light was illuminated. The contact stated the vehicle stalled while driving at an undisclosed speed. The contact stated that several attempts were needed to restart the vehicle to continue driving. The contact stated that the gear shifter intermittently failed to move to the intended position. The contact stated that there was an abnormal fuel odor inside the cabin of the vehicle, and the fuel level was lowered sooner than normal. The vehicle was taken to the dealer to be diagnosed; however, the result was not provided. The contact stated that there was a code for an EVAP failure. The vehicle was not repaired. The vehicle was taken to another dealer, Peoria Ford (9130 W Bell Rd, Peoria, AZ 85382) however, the contact was not provided the cause for the failure. The vehicle was taken to an independent mechanic; however, the vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 200,000.

Filed Mar 12, 2021 · Fuel system · 385,000 miles · NY

Tl* the contact owns a 1997 mercury mountaineer. The contact stated while the vehicle was stationary, the vehicle stalled. The contact stated no warning light was illuminated. The vehicle was taken to an unknown dealer to be diagnosed. The contact was informed that the fuel pump needed to be replaced. The vehicle was not repaired. The manufacturer had not been informed of the failure. The failure mileage was approximately 385,000.

Filed Sep 7, 2017 · Engine, Fuel system · 42,000 miles · MA

I purchased this vehicle recently with only 40,000 miles. The car keeps stalling or dying as you may say as I drive. It will be okay for a short period of time and then just die right on the highway! Once it dies once, the car will continue to do so over and over again until the engine has cooled down. I have the engine codes of p2104, p2111 and p2135 with a refere to p2101. I have brought it to several mechanics and paid well over $1,000 to fix this problem and it just continues. I am afraid my family may all die! Were on 93 recently heading toward boston and my car died right at the intersection of 495. I had all my children in the car and it would not restart. I have fixed the fuel system (error code last time), had a complete tune up, and throttle sensor etc.

Filed Nov 8, 2016 · Engine · FL

"takata recall" engine always turns off while driving. I fixed it at 3 different workshops and still the same.

Filed Jun 26, 2016 · Engine, Fuel system · 65,000 miles · CO

At high speeds, the car stalls. It also stalls at stop lights. This happens repeatedly, and ford cannot figure out what is wrong with it.

Filed Apr 30, 2016 · Transmission · 135,000 miles · MD

2nd mountaineer owned transmission will not shift in low gears and unresponsive. Stalled in town and on highway at high speeds almost causing collisions several times after becoming unresponsive while driving.

Filed Mar 7, 2016 · Engine · 143,000 miles · PA

My vehicle shuts off while driving. No warning, loses power steering, loses power brakes. It will start righ back up once I shift into park. This happens at all different speeds and temperatures. I could have just got in the car or been driving for hours. Happens at 15mph and 60mph just the same. Have almost been hit from behind of several occasions when this has happened.

Filed Mar 5, 2016 · 134,483 miles · PA

2006 mercury mountaineer driving along around town or highway and will just loose power without warning after the fact then the engine light comes on along with a red wrench or an orange wrench, first place I had it to said it was a negative battery cable that was loose so they tightened the cable, took it home stalled out on me, took it to another dealer said was reading that it was the fuel pump driver module drove very next day stalled on me once again taking it to the ford dealer itself said could be a number of things one is that the mass air flow has exposed wire which they will be fixing that and cleaning out the electrical throttle body and see how that is if not then they will try replacing the torque convertor clutch circuit for one this needs to stop being a guessing game I'm not a millionaire I used my 401k to purchase this vehicle, its such a huge safety issue while on the main highway and just up and stopped on me luckily I was able to drift over to the side of the road in the meanwhile with a tractor trailer coming up behind me with several other traffic huge safety concern ford contacted by the one garage and they "wasn't sure" what it could be, well it stops anytime while driving anywhere such a huge safety hazard someone has to know something without having to just "guess" the situation. Also every time it rains the water seeps thru the sunroof and the overhead light you can see it came thru the liner itself when it dries up, so heartbreaking because I fell in love with this vehicle that I have only had for about a year and half.

Filed Feb 29, 2016 · Electrical, Seats · 80,000 miles · MN

Defective ignition. When driving, if you bump the key (or attached keychain), all interior lights will come on, and the drivers seat will retract all the way back into the "easy entry/exit" position, making it impossible for a shorter person to reach the brake or gas pedal. Sometimes during this event, the car will stall. This is very dangerous, and the internet is full of people having this identical issue. Why hasn't this been recalled yet?!? People are paying for a new ignition tumbler, but before long it starts happening to the replacement tumbler as well. Http://www.carcomplaints.com/mercury/mountaineer/2008/accessories-interior/seats.shtml

Filed Jan 14, 2016 · Engine, Fuel system · 142,000 miles · PA

This vehicle idles very low and stalls at various speeds. No warning is given engine just shuts down. Spark plugs have blown totally out from the engine several times.