Ever since i got the truck from my dad it has been having trouble. When i drive on the highway its fine but when i make to many stops or drive 45 or less it starts to slowe down and hesistates like its not pickin up enough gas. I press on the peddle it goes all the way down adn sometimes it will start to go but usually just wont so i would pull over and restart it then it goes again. I got it checked on the computer and nothin showed up . They couldnt figure out what was wrong with it.