ECU tune is done to my car, but I do not think it has anything to do with it, only because it is so sporadic and intermittent. I have not seen the issue in over 2 weeks since it last happened out at the Dragon.

Dave, the first things I did was go back to stock equipment and performed several well documents vaccuum leak tests, all of which passed perfectly.

Max, let us know what percentage of your car the dealership replaces to try and solve the problem, my guess is at least 5-7%