Hello. I have a problem with my Pontiac, which I like very much. It seems to me that as soon cut off my gas pedal. (For 2 to run my max speed = 50, after reaching her car does not want to go and I need to change gear) on 2 running at 50 / h 4.5/4.9 I have thousands of revolutions. Is not that enough? If so, what might be responsible for the vulnerability?