I guess the first thing that I would do in this member's situation is to connect up a code scanner and check for anything untoward. Alternatively, I've read on the forum that some members have experienced ECM problmes due to poor electrical soldering. I'd be buying one of the ECMs from that guy who is parting out two Crossfires elsewhere on the forum (if he'd sell at a reaonsable price) and then make the swap out.