Fails to accelerate when the pedal is pressed or revs to quickly when the pedal is pressed-see rk. found electronic throttle control fault. there is no throttle movement until the accelerator pedal is pressed approximately 1/3 to 1/2 way to the floor. then the vehicle lurches due to rapid throttle opening to 1/3-1/2. there are no stored diagnostic codes. the vehicle is not going into fail safe mode as it should. with any throttle or accelerator pedal malfunction. the vehicle never entered fail safe mode even after repeated malfunctions. the vehicle is unsafe to drive.