The contact owns a 2014 Ford F-150. The contact stated that the vehicle was repaired under NHTSA Campaign Number: 24V444000 (Power Train); however, the repair failed to prevent a failure from occurring. The contact stated that 9 months after the recall repair was completed, while accelerating from a stop, the RPM increased; however, the vehicle failed to accelerate as intended while the accelerator pedal was depressed. The contact pulled over into a parking lot, and the vehicle was towed to an independent mechanic to be diagnosed; however, no fault codes were retrieved. The mechanic was unable to duplicate the failure. The local dealer was contacted. The vehicle was not diagnosed or repaired due to cost. The manufacturer was made aware of the failure. The failure mileage was approximately 125,000.