I own a 2005 Saturn Vue with 234579 original miles on it. It runs great until about 3 Weeks ago... \nIt's only good for one-way travel. Once I turn it off it will not start again until it sits for approx 6 hours or longer. The engine turns over but doesn't start. Computer sends no codes and doesnt display anything when scanning for codes. \nWe thought it needed a new ECM but after installing a new one we have the same problem again. Any suggestions??