hie i've had this problem for about 2days now, when i turn my car on sometimes it doesn't turn on but when i try after a few seconds it does turn on i was thinking maybe its the battery? and the other problem is when i slow down like at the lights it lunges forward a bit after coming to a complete stop...this also happens when im accelerating as well like it delays to change gears and after it changes, it lunges forward a bit...pls help...its an auto by the way