2014 Ford Mustang acceleration problems

Filed Sep 10, 2025 · Acceleration · 175,000 miles · PA

The contact owns a 2014 Ford Mustang. The contact stated that while the vehicle was parked and occupied or while driving, the vehicle accelerated independently. A dealer was contacted. The vehicle was towed to the residence and then was towed the following day to a dealer to be diagnosed; however, the contact was unaware of the diagnostic result. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 175,000.

Filed Dec 3, 2019 · Acceleration · 31,000 miles · FL

I was shifting out of a parking space from reverse to drive. The wrench icon came on on the dashboard and the car shuttered. I immediately turned it off, left it off for about 10 seconds and starting it again. I pulled into a parking space, called my husband and he came to follow me home in case it happened while driving on the street. It did not. About 4 days later I pulled out of my garage and the wrench icon came on again and the car shuttered. I turned it off and pulled the car into the garage again. A few days later I was able to get it in with my mechanic. They could not find anything wrong with it on the diagnostics and could not replicate the fault. I found a lot on line about the throttle body problems with ford vehicles. My brother had the exact same thing happen to his car (same problem) and he had it towed to the dealer and the throttle body was replaced free of charge. They told him this happens a lot. So, I will bring my car home today with nothing found. How do I trust it to drive it? Thanks for your time.

Filed Oct 28, 2019 · Acceleration, Engine · 70,000 miles · FL

I was driving my vehicle on the highway (I-4) on my way to work on 10/24/2019, I was going about 65 MPH and suddenly the vehicle decreased speed to about 35 -40 MPH, on the instrument panel the wrench light or symbol came on, I was almost rear ended and hit by 2 vehicles traveling at normal speed. As I pressed on the gas pedal the car would not pick up speed, I believe this is called "limp mode'. I was luckily able to avoid the accident by pulling off to the side of the highway. I shut the vehicle off, since I was not sure if it could also be a fire hazard. Waited a few minutes and looked up the issue on the internet. I turned the vehicle back on and it was as if nothing had ever happened. I was able to get back on the road and I thought maybe it was just a malfunction. I was very scared but drove into work with no idling issues. Saturday 10/26/2019 I was on my way to the grocery store and it happened again, near my house on a residential road. I was going about 35-40 and all of the sudden the vehicle once again slowed down, this time to about 10-15 MPH. Once again, I was almost rear ended, I was able to pull onto the side of the road, this time I called a tow truck. I waited a few hours and nothing. I shut the vehicle off and drove home, about half a mile. Once again the dashboard clear and car drove off with no issue. Car was taken to dealership on 10/26/2019. It is currently being looked at but I do not feel safe driving this vehicle.

Filed Jul 31, 2015 · Acceleration, Fuel system · 36,400 miles · FL

Tl* the contact owns a 2014 ford mustang. When the accelerator pedal was depressed at approximately 80 MPH, a fuel odor emitted from the air vent inside the vehicle. The vehicle was taken to a dealer where a smoke test was performed and the technician stated that the vehicle was operating as designed. In addition, while driving approximately 35 MPH, the vehicle stalled and the check engine warning light illuminated. The vehicle was taken to a dealer where it was diagnosed that the throttle body needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 36,400. The VIN was not available.

Filed Feb 18, 2015 · Acceleration, Electrical · 7,150 miles · FL

This is the second time this has happened. Upon starting the car, the motor revs uncontrolled to about 7000 rpms. I have to turn ignition off to stop the motor from damaging its self. If my foot was to ever slip off the clutch, we would race uncontrolled in reverse! The car is always parked and started while in reverse. Almost afraid to start this car.

Filed Jan 5, 2015 · Acceleration, Engine · 500 miles · CA

When downshifting in the manual transmission version of this vehicle, the car doesn't slow down on any decline and instead accelerates (without touching the gas pedal). Also, while slowing down on a flat road (at 1,500 to 1,700rpm) the car accelerates by itself and fights the brakes while in gear.

Filed Nov 6, 2014 · Acceleration, Brakes · 2,500 miles · CO

When brakes were applied to disengage cruise control, brakes acted as if they had lost power, and cruise control failed to disengage. This has subsequently occurred four more times, most recently in early october.

Filed Oct 9, 2014 · Acceleration, Brakes · 8,042 miles · FL

2014 ford mustang. Consumer writes in regards to engine problems. *smd the consumer stated she heard a ticking sound, after driving for 15 minutes. The dealer stated the entire long block needed to be replaced. After the long block was replaced, the engine light started flashing, and the engine was revving higher than normal. The vehicle accelerating by itself in gear and there were pressure issues with the brake pedal. The dealer was unable to replicate the consumers concern. The next time the consumer returned to the dealer, the ignition was replaced. The RPM's continued to rev, idle was very rough, even with the AC off. The ticking noise was still present, and the brake pedal was hard to the touch.

Filed Oct 1, 2014 · Acceleration, Engine · 1,000 miles · TN

From day 1 until present with 6400 miles, this car on hard acceleration, brings in exhaust fumes so severe that the fumes will make you physically sick and will even set off a carbon dioxide detector ( this happens with all windows shut and the air on recirculate). Normal driving, no problem if engine rpms are kept below 1500 RPM --- but---- don`t try to get up to speed merging on a freeway or any high revving situation. Ford dealer won`t do anything until it throws a computer code, which it has not. Ford customer service is a joke after spending hours on the phone. I think I bought a modern yugo.

Filed Oct 3, 2013 · Acceleration, Transmission · 1,600 miles · AZ · crash

Tl* the contact owns a 2014 ford mustang. The contact stated that while stopped with the vehicle engaged in the accessory mode, she was able to move the gear shifter into reverse, causing her to crash into another vehicle. The contact attempted to apply the brakes but they did not respond. The contact was not injured. A police report was not filed. The vehicle was taken to the dealer for diagnosis. The technician stated that the brakes would be inspected but the vehicle seemed to be functioning as designed. The manufacturer was not made aware of the failure. The vehicle was repaired for the body damages. The approximate failure mileage was 1,600.