The contact owns a 2011 Ford F-350. The contact stated while reversing, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The contact stated that the vehicle stalled and failed to restart. There was no warning light illuminated. The contact stated that an independent mechanic arrived at the residence however, the vehicle failed to restart. The vehicle was towed to an independent mechanic. The contact was informed that the high-pressure fuel pump had failed, and the fuel system needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure but denied assistance in covering the cost of the repair. The failure mileage was approximately 200,000.