Tl* the contact owns a 2005 mercury montego. The contact stated that after shifting into gear, the vehicle lunged forward abnormally. The vehicle was taken to the dealer who was unable to diagnose the failure. The manufacturer was not made aware of the failure. The vehicle was not repaired and the VIN was not available. The failure mileage was 50,000 and the current mileage was 86,087.
2005 Mercury Montego acceleration complaints
Page 2 of 2: complaints 11 to 24 of 24, newest first, as owners wrote them.
We own a 2005 mercury montego premier. Over the past several months have noticed alternate stalling or random accelerating however on saturday, as I was accelerating the vehicle suddenly stalled & refused to go over 1,000 rpms. We took the vehicle to a local repair shop who performed a diagnostic which located the failure at the throttle body. Car is currently @ local repair shop, estimate of $850.00 to repair.
When accelerating the vehicle would be rough and inconsistent almost lurching forward at times. The vehicle would do this every time it was driven. After having to replace the vehicles battery the vehicle would not accelerate at all. The rpms would not go above 1000. The throttle body was replaced and now the vehicle drives fine. I do still have the old part.
Tl* the contact owns a 2005 mercury montego. The contact stated that while driving 30 MPH, the entire electrical system malfunctioned and caused the rear brakes and instrument cluster to fail. The vehicle was taken to an authorized dealer, where a diagnostic test indicated that the throttle body and alternator were faulty. The dealer replaced the throttle body, but not the alternator. The failure continued. The vehicle was taken back to the authorized dealer, where they were unable to diagnose the failure. The failure mileage was 95,275.
Tl* the contact owns a 2005 mercury montego. The contact stated while driving the vehicle suddenly accelerated, the message ( engine failed safe mode ) illuminated on the instrument panel which caused the vehicle to stall. The vehicle was taken to the dealer who diagnosed that the throttle body and the alternator needed to be replaced. The manufacturer was made aware of the failure and referred him to the federal safety agency. The vehicle was not repaired. The failure mileage was 130,500 and current mileage was 130,520.
Tl* the contact owns a 2005 mercury montego premier. The contact stated that the vehicle suddenly accelerated numerous times, would lose power and stall. The vehicle was taken to the dealer who performed a diagnostic which located the failure at the throttle body sensor. The throttle body sensor was not replaced. The manufacturer advised the contact that the failure was not recalled. The vehicle was not repaired. The failure mileage was 86,000 and the current mileage was 100,000.
I have a 05 montego I brought used last year it wants to go by itself when u start to leave I almost hit a person while in drive thru last week this is scary does someone have to dye or get hurt before a recall was told it the throttle body sensor really expensive to fix and not sure which one theirs two im told.
Engine revs up, and car lurches, typically when: - shifting into drive or reverse and/or moving away from idle; - almost always when the wheels are cranked all the way to the left or right and the car is moving away from idle. The lurching is sudden and "violent" enough that it can catch a driver unprepared - my wife and I are used to it and able to compensate, but we aren't letting our 17 year-old drive the car for now unless one of us is with her. Ongoing problem since car was purchased new. This has been an occasional problem for years - complaint was even made while car was still under its 3 year/36,000 mile warranty (nothing found). Problem has been getting more frequent over the past year or so.
Tl*the contact owns a 2005 mercury montego. The contact stated that while driving, the vehicle began to jerk and knock and when she depressed the accelerator pedal, the speed would not increase. Also when she attempted to brake, the vehicle would not slow down and at times would actually speed up. The contact called the manufacturer who stated that the throttle body and transmission had to be replaced at her expense. The vehicle had not been repaired. The current and failure mileages were approximately 77,000.
My 2005 mercury montego (79,000mi.) has unexpectedly lurched on two occasions. The first time I was driving slowly in a parking lot, and the car suddenly accelerated and lunged forward. Braking helped, but the lunging occurred again each time I tried to drive forward. I was able to move into a parking space and turn the car off which stopped the lurching movement. I sat for several minutes, restarted the car and drove away without incident. This didn't happen again for several months until a similar occurrence yesterday. This time I was ready to back out af a parking space, put the car in reverse and it surged backward. I depressed the brake, put the car in park, and shut it off. Once again I waited several minutes and drove away without incident. This is a very dangerous situation as people could have been close to the car when it lunged, or I could have been in traffic. I consider this to be a serious safety issue. With both of these occurrences the " fail safe mode" message appeared.
Tl* the contact owns a 2005 mercury montego. The contact stated while driving at approximately 65 MPH, the vehicle independently shifted into failsafe engine mode. There was also an unusual increase in engine rpms. The contact shut off the vehicle and when restarting, the warning light was no longer illuminated and the vehicle resumed normal operation. The dealer advised that the failure was potentially caused by debris and should have corrected itself. The contact was advised not to bring the vehicle in. The failure recurred within three days. The vehicle was taken to a local repair facility where the contact was advised that the throttle body was defective and recommended a fuel injection service. The vehicle was taken to the dealer where repairs were made. The manufacturer was not contacted. The failure mileage was approximately 178,000 and the current mileage was approximately 179,000.
Tl*the contact owns a 2005 mercury montego. The contact was driving at speeds of 20 MPH. When they attempted to pass another vehicle, she depressed the accelerator and the vehicle was hesitant to increase speed similar to driving while in neutral. In addition, when depressing the brake pedal, the vehicle would jerk abnormally. The dealer reset the vehicle computer system and the vehicle returned to normal operation for a short period; however, the failure recurred. The contact had not taken the vehicle back to the dealer. The failure mileage was 51,000 and the current mileage was 64,000.
While idling when stopped or when moving slowly, the engine speed suddenly accelerates to above 3500 RPM causing the car to lurch forward unless the brake is firmly applied. The sudden acceleration lasts 3 to 5 seconds. Placing the gear into neutral has no effect on the engine speed. This happens sporadically. In the last 3 months it has happened approximately 7 times. Dealer says the car's computer system reports nothing unusual.
Tl*the contact owns a 2005 mercury montego. She stated that the throttle body failed which made the vehicle shut off in the middle of the highway. She pulled over and turned the engine off and back on then it shut off on its own. The following day the failure recurred and the check engine light illuminated on the instrumental panel. The dealer stated that they would repair the vehicle at the owners expense when the part were available. They later stated that the part was available and that they have exhausted all options to repair the vehicle. The vehicle was not repaired; however, it remained in the dealers possession. The service manager stated that they would not repair the vehicle and the contact should retrieve it. The vehicle identification number was unavailable. The failure and current mileage were 57000.
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