2021 Ford F-150: misfire or rough idle

Filed Aug 10, 2026 · Fuel system · AK

This recall has been going on for over a year. I don't know how long these usually take, but this recall - Manufacturer Recall Number25S75 the federal safety agency Recall Number25V455 Recall StatusRecall Incomplete, remedy not yet available My truck runs rough at times which I believe is a direct result from the fuel pump on this recall, and it doesn't give me much confidence on my daily driver truck, especially going on long trips. I don't know if this message carries any weight in the timeline on this recall, but I would really like this fixed soon so I don't have a stall incident with my family in the vehicle.

Filed Jul 9, 2026 · Engine, Fuel system · NC

Truck has just started misfiring out of the blue, have had Ford dealerships look at it, have changed all 6 spark plugs and one ignition coil. The recall the federal safety agency 2025-366 may be the reason, it states there still is no remedy for this, recall was issued 1 year ago, July 2025. I need this remedy.

Filed Jul 1, 2026 · Fuel system · TX

The truck’s fuel system can cut out under acceleration. This is very dangerous. Various times it has nearly stalled out under acceleration while trying to merge. The worst time was driving up a bridge, the truck began to hesitate nearly causing a crash. Every time it signals cylinder misfire, but that whole system has been replaced. Very dangerous, very disappointing.

Filed Jun 8, 2026 · Engine · CA

Misfire at 51000 miles and told it was 2 cracked spark plugs

Filed Dec 23, 2025 · Acceleration, Engine · CO

Description of Incident: The vehicle exhibits a severe and unpredictable transmission "shudder," "stutter," and hesitation during gear synchronization, specifically during 1st–3rd and 8th–10th gear transitions. This manifest as a violent "shaking" sensation and a loss of momentary acceleration while merging into high-speed traffic. This issue was first reported to an authorized Ford dealership on December 17, 2024. At that time, the vehicle exhibited harsh shifting and "shuddering" consistent with Ford Technical Service Bulletin (TSB) 22-2428. Despite being under a 150,000-mile service contract, the dealer misdiagnosed the mechanical transmission defect as an engine misfire, resulting in ineffective repairs. The defect has persisted and worsened. The internal failure has been identified as a defective CDF Clutch Drum (Cylinder) where an internal bushing moves out of place, obstructing fluid flow and causing mechanical "slip." This is a known manufacturing defect documented in multiple Ford TSBs (22-2428, 23-2250, and 24-2101). Safety Risk: The failure causes unpredictable power delivery. On multiple occasions, the vehicle has hesitated or "stuttered" while attempting to merge onto highways or cross intersections, leaving the vehicle vulnerable to side-impact or rear-end collisions. The lack of consistent throttle response and the violent nature of the shifting creates a significant safety hazard for the driver and surrounding motorists. Verification/Inspection: The symptoms were reported to a Ford dealership multiple times. As of December 2025, the dealership has opened a formal case with the manufacturer to verify the internal "cause of failure" by the Shop Foreman. No warning lamps or Diagnostic Trouble Codes (DTCs) appeared on the dashboard, as the failure is a mechanical internal bushing slip that does not always trigger a software sensor until total failure occurs. The vehicle is available for inspection.

Filed Sep 24, 2025 · Engine, Steering · 56,000 miles · GA

The contact owns a 2021 Ford F-150. The contact stated that three months after purchasing the vehicle, while her husband was driving, the vehicle was driving roughly, and the transmission unexpectedly downshifted. The contact was unaware whether any warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed, and it was determined that there was a misfire in cylinders #1, #3, #4, and #6. The spark plugs were replaced, and the vehicle was repaired. The contact stated that on a separate occasion, a month after the repair, there was an abnormal sound coming from the steering wheel. The vehicle was taken back to the dealer, where it was diagnosed that the wheel bearing and axle had failed and needed to be replaced. The vehicle remained at the dealer unrepaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 56,000.

Filed Mar 5, 2025 · Engine · KY

My truck has a 2.7 eco boost engine than has failed around 134,000 miles. The truck had a couple of misfires over the last couple of months, but otherwise no issues. I drove the truck one Saturday, did not drive Sunday, and on Monday I am told the engine is completely seized and I am responsible for replacing the engine. Ford will not attempt to determine if the recall for the valve intake stem has caused the issue and now I am spending over $12,000 to replace a 4 year old engine with no other issues.

Filed Oct 19, 2023 · Engine · NY

3.3L V6 F-150 started to heavily vibrate when vehicle was started. Check engine light came on. Check engine code was cylinder 1 misfire. Coils and injectors were changed. It didn't fix the problem. Upon further investigation there was damage to piston. Full Engine replacement is required.

Filed Jun 6, 2023 · Engine, Transmission · TX

Started with check engine light for cylinder 5 misfire and engine was running rough with loss of power. Took the truck to dealer and dealer reports compression loss as reason for engine failure. After doing some research there appears to be a major issue with the same engine (2.7 ecoboost) of the same year(2021) reported for the Bronco and F150 for catastrophic engine failure. I suspect this is the same engine failure that my truck experienced.