The contact owns a 2014 Hyundai Elantra. The contact stated while the vehicle was parked, the vehicle was started, and the engine revved abnormally. There was no warning light illuminated. Additionally, the contact stated while stopped at a stopped sign, the accelerator pedal was depressed, and the vehicle jerked forward before accelerating. The contact stated that the failure had occurred several times. The vehicle was taken to the dealer twice; however, the failure was not duplicated. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 94,512.