Well I did have a vacuum leak on my EGR valve but I also corrected that. Act like when engine gets to running temp 80C starts shutting down cylinders like its running on 5 or 6 instead of eight. Did I mention I has throttle body rebuilt by business in Oakland Park, FL. I know nothing about the ECU but read a post that said it would shut down 2 cylinders if it heated up or the board had a cold solder. That acts like whats going on. Not sure though. I dont know... just frustrated