I have a 1998 Audi A4 2.8 That just shuts off for no reason once it shuts off you can wait 10 to 20 mins and it will start back up if the check engine light is on it will start up if its not all it will do is crank,have 2 codes P1565 and P0604, here's what I have done, cleaned throttle body,removed ECM to look at contacts solder issues, replaced cam position sensor,checked connections and vacuum hoses, but still have issues I'm thinking coil or ECM. Has anyone had the same problem? When it shuts off it shuts off fast, no stutter or anything.