I loaned my Tiburon to a friend, she got a few miles down the road and the car quit. It starts but runs so horribly it sounds like it's going to blow up. No lights are on and it shows no codes like everything is fine. First thought is the position sensors, then maybe that it jumped time. But since it has no codes I'm thinking ECU. I know alot about cars but I'm not a mechanic by no means, so I need some help here please.