Ford Bronco Sport misfire problems

Filed Oct 26, 2026 · Fuel system, Transmission · OH

The contact owns a 2021 Ford Bronco Sport equipped with an 8F35 automatic transmission. While driving between 25 and 45 MPH under normal acceleration, the vehicle experienced repeated violent hesitation, jerking, and lunging 4 to 5 times in rapid succession, accompanied by rapid RPM fluctuations between 2,000 and 3,000 RPM. The condition mimics an engine misfire or momentary stall and loss of motive power during acceleration, creating an immediate safety hazard and risk of rear-end collision in active traffic. The vehicle was taken to an authorized Ford dealership (Cronin Ford North) on September 30, 2026. The dealership verified and duplicated the complaint on a road test, monitored PIDs, and officially confirmed that the torque converter clutch (TCC) was slipping. Despite confirming mechanical slip, the dealership stated in writing that there were "no relevant articles," overlooking the published Ford Special Service Message SSM 54797 for 8F35 torque converter shudder below 60 MPH. The dealership recommended replacing the torque converter and main control valve body for over $5,200. When the owner declined due to cost, the vehicle was released back into service without answering the owner's written safety inquiry regarding whether the vehicle was safe to operate with verified drivetrain slippage. Additionally, the vehicle has an open safety recall (25S76) for which Ford corporate confirmed no remedy or parts are currently available. The vehicle has not stalled completely, but the severe hesitation and surging persist under normal acceleration. The manufacturer has not provided a resolution.

Filed Oct 14, 2026 · Engine · AR

Vehicle had rough idle. Loss power. Loss engine coolant and oil and started pouring large amounts of white smoke from exhaust.

Filed Oct 13, 2026 · Fuel system · GA

misfire from fuel injectors

Filed Oct 5, 2026 · Fuel system · CA

I have had issues dating back to when I first got the car with rough idling and it turning off while idling. Most recently about 2 weeks ago experienced inability to turn the car on after fueling with gas. Rough idling and turning off while idling were also associated with gas filling. I took this car to Ford dealership multiple times. Check engine light came on associated with EVAP leak code. Ford dealership unable to diagnosis. I took to an independent mechanic who diagnosed in 10 minutes it is an EVAP purge valve malfunction and that likely this had been defective for some time. I reported this to ford and they refuse to compensate for this. I have seen multiple reports online of same issue with other ford bronco sport dealers. This failure seems abnormally premature and defective design. Concerning it results in loss of power of the vehicle as well.

Filed Sep 15, 2026 · Engine, Fuel system · 124,000 miles · OH

The contact owns a 2021 Ford Bronco Sport. The contact stated that while operating the vehicle, exhaust fumes and a fuel odor entered the cabin, and the check engine warning light illuminated. The engine misfired, and the vehicle hesitated while driving. Upon inspecting under the hood, the contact discovered black soot in the engine compartment. The vehicle was taken to a local dealer for diagnosis, where the dealer determined that the piston solenoid, catalytic converter, and driver’s side lower control arm and bushing needed replacement. The contact stated that the PCM was previously replaced. The contact associated the failure with the federal safety agency Campaign Number: 26V340000 (Suspension); however, the VIN was not included in the recall. The manufacturer was notified of the failure. The failure mileage was 124,000.

Filed Aug 12, 2026 · Engine, Transmission · WA

Oil pump solenoid has been replaced 3 times and the vehicle is under 100,000 miles. There is a low oil light illuminates on dash board in addition to acceleration lose and a white smoke coming from under the hood and the back end of the vehicle. The 6th or 7th time this happened the Bronco had to be towed. There were many more problems included in this tow, powertrain failure, engine misfire, loss of power, crackling, popping sound from under the hood.

Filed Jul 24, 2026 · Transmission · VA

What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle’s drivetrain or all-wheel-drive system appears to be malfunctioning. During turns, the vehicle runs rough, feels as though it is binding or shuddering, and becomes harder to accelerate. The exact failed component has not yet been diagnosed. The vehicle is available for inspection upon request, and I have a service appointment scheduled in approximately two weeks. How was your safety or the safety of others put at risk? The reduced acceleration and rough operation while turning make the vehicle respond unpredictably. This could prevent me from accelerating safely through an intersection, entering traffic, or avoiding another vehicle or hazard. Has the problem been reproduced or confirmed by a dealer or independent service center? No. The problem has not yet been reproduced or confirmed by a dealer or independent service center. I have an appointment scheduled in approximately two weeks for inspection and diagnosis. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No. The vehicle and suspected component have not yet been inspected by the manufacturer, police, insurance representatives, or others. An inspection appointment is scheduled in approximately two weeks. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No warning lamps or dashboard messages appeared. The symptoms consisted of rough running, shuddering or binding while turning, and reduced acceleration. The symptoms first appeared recently when the vehicle had approximately 48,000 miles.

Filed May 18, 2026 · Engine · VA

This vehicle was sold to me by Front Royal Ford on August 16, 2025 with an UNDISCLOSED active safety recall. This vehicle recall still shows as active and the car remains in an "unsold" status within the Ford system, since they legally were not permitted to sell me the vehicle. I only discovered this after the car's engine light went off in September 2025, and a dealership in Indiana refused to initially do any work on it, stating it wasn't under warranty. The first repair was on September 25, 2025 and the repair was stated as a loose wire, the second repair to replace an actuator was on December 16, 2025, and it's presently undergoing a third repair for an engine misfire that occured on May 17, 2026. At this point, the repairs all related to the engine qualify for the lemon law and the car was never supposed to be sold with an open safety recall.

Filed Feb 8, 2026 · Engine, Fuel system · MI

On 12/22/2025, my fiancé and I purchased a 2022 Ford Bronco Sport from LaFontaine Ford in Lansing, MI. During the initial purchase, we were not aware of any recalls or vehicle defects with the Bronco Sport. Roughly one month later, the check engine light came on, and after a thorough vehicle inspection, we were notified that there was a recall on the vehicle in regards to bad fuel injector(s), and that we needed to bring the vehicle back to the dealership for a computer update. After dropping the vehicle off at the dealership, we were notified that the engine was blown due to a cylinder misfire as a result of a bad fuel injector. We were also advised that the dealership had already completed the computer update prior to our purchase and cleared out the codes (critical misfire). The negligence of the dealership put my fiancé in extreme danger with selling us a vehicle with a critical fault that could cause a vehicle fire! The problem still has not been remedied as Ford is asking up to pay $3,483.00 for a new engine with them covering $4,457.00. I believe all of this should be covered under the recall and/or powertrain warranty since this issue has been well documented with Ford Bronco's prior to us purchasing the vehicle.

Filed Nov 13, 2025 · Engine · CA

We purchased this vehicle 02/2025. The salesman stated there was a 5 point inspection and the car was good on fluids oil and brakes. We questioned the rough idle and odd sound the car made and we were told that it was normal. 07/2025 a mobile mechanic came out and repaired a recall. He stated in his notes that the car had an oil leak but he could not determine where. Fast forward to now, my car has been needing oil more than usual since we have got the car. There is a leak but it does not leak on the ground. 11/11/2025, I contacted Big Valley Ford in Stockton CA with concerns about the oil depleting rapidly and how my check engine light comes on which tells me my car has absolutely no oil. I mentioned a recall I saw online 22S21 and Greg (the man I spoke with) stated that was never a recall for my car. He saw the oil separator was replaced in 2022 but it was not for a recall. Greg then told me to make an appointment to bring the car in for a diagnostic and then an oil change. They would then mark my car where the oil is and have me come back in a few days to see how far the oil went down. I asked how much and he said 225 for the diagnostic and 135 for the oil change. Convinced he was lying to me, I called Ford in Tracy, CA and they confirmed there was a recall 22S21 for the oil separator. This car has given me so many problems and this issue clearly was never fixed and they sold me the car this way.