i was driving down the highway my van was going 60 it slowed down to 50 then 40 then 30 then 20, 10 then it stopped and smelt bad. afterwords i tried starting it, the engine was turning but it wouldnt start. later that night i had it towed home and the engine wouldnt turn. now the battery's dead and the engine still wont turn. it ran great and i miss my first vehicle! will someone inform me on what may be wrong with my van? thank you