I have a 1986 dodge ram with a staight 6 engine. It starts just fine and drives just fine but 5 or 10 minutes into that drive and my engine boggs down and dies. It makes this jerky motion and i drop speen until eventually it dies and I have to roll over onto the shoulder. All my fluids are in goodshape although my engine coolant is starting to get low. Its carbonated but I think its fuel li e but i have no clue. If someone can help help me I would appreciate it greatly.