2017 Ford Mustang: misfire or rough idle

Filed May 26, 2026 · Engine · 50,000 miles · PA

The contact owns a 2017 Ford Mustang. The vehicle was taken to the local dealer for a routine timing cover replacement. The contact believed the engine was damaged while being serviced. Upon retrieval, the check engine light was illuminated. There was an abnormal ticking noise detected. The vehicle had misfired. The vehicle had not been diagnosed or repaired. The manufacturer was not notified. The failure mileage was approximately 50,000.

Filed May 14, 2026 · Engine · CA

Head gasket failure, specifically corrosion of the engine block. One day the car just did not start at all, with no clear indication of head gasket failure until compression test was ran. Symptoms include coolant levels getting lower each week, with constant refills needed. Random misfires. Smoke randomly emitting from the exhaust when idle. Has not been inspected by the manufacturer, police or insurance.

Filed Jul 7, 2025 · Engine · 115,288 miles · FL

The contact owns a 2017 Ford Mustang. The contact stated that after the vehicle was started in the morning, the vehicle was idling rough. The contact stated that later while driving at various speeds, there was a misfire coming from the engine. The contact stated that while checking the engine oil level, the contact became aware that the coolant reservoir level was low. The contact refilled the coolant reservoir however, the engine misfire continued. The contact had taken the vehicle to a local dealer who diagnosed the vehicle and determined that there was coolant intrusion into the cylinders, and that the engine needed to be replaced. The vehicle was not repaired. The contact notified the manufacturer of the failure and was referred by the manufacturer to contact the federal safety agency Safety Hotline to report the failure. The failure mileage was 115,288.

Filed Apr 30, 2025 · Engine · 81,000 miles · TX

The contact owns a 2017 Ford Mustang. The contact stated that upon starting the vehicle, the check engine warning light was illuminated. The vehicle was taken to Auto Zone, where the contact was informed that there was misfire in the engine. The vehicle was then taken to the dealer, where it was diagnosed that there was coolant intrusion into cylinder #2. The dealer recommended that the long block be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for information on the federal safety agency Campaign Number: 16V779000 (Engine and Engine Cooling). The failure mileage was approximately 81,000.

Filed Feb 13, 2024 · Engine · 88,000 miles · IL

The contact owns a 2017 Ford Mustang. The contact stated while driving at an undisclosed speed, the vehicle was jerking with the check engine warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed and determined that cylinder #1 had misfired and that the long block needed to be replaced. The vehicle was not repaired. The contact stated that the spark plugs, and ignition coils had previously been replaced. The manufacturer was made aware of the failure and advised the contact to file a complaint with the federal safety agency Hotline. The failure mileage was approximately 88,000.

Filed Oct 7, 2023 · Engine, Transmission · CA

June 2022, approx. 53000 miles, misfire codes. Replaced spark plugs. Codes continued intermittently. January 2023 car was inspected due to heater inop at 61228 miles. Coolant low and misfires. No repairs, just coolant added. I topped off coolant 3X until April of 2023 at 61631 miles, white smoke and damp smell from exhaust along with continuing misfires. Dealer stated water intrusion, engine and turbo bad. No warranty, less than 50% of cost covered by manufacturer. June 2023 car was returned to me. Back at dealer 4 days later, 61691 miles, rear end shudder. Bad rear differential. Manufacturer covered less than 50% of cost. All maintenance was performed at or earlier than warranty required including rear differential service at 33283 miles with Ford.

Filed May 27, 2021 · NC · crash · fire

2017 ecoboost mustang , 31k miles, 17 yr old daughter pulls out of neighborhood going to high school! 1/4 of a mile (4 houses) down she hears a loud boom then car bursts into flames under the hood near firewall or windshield wiper arms. Cause is coolant leaking into the cylinders, which in turn caused the misfires, and engine to catch on fire. Ford has been aware of this issue since 2016.