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 the failure from occurring shortly after the vehicle was repaired. The contact stated that while driving at various speeds, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The local dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 140,000.