I am not sure if they checked the ICV at all. I could suggest that for them. My problem is different from the Powerchip problem. I was never revving the engine that high. Like I said, it is a daily driver, and was used just like a normal car, nothing crazy. Plus, I have had the ESS tune for a long time now, and those problems happened right after they received their tune.
2008 M3 Sedan- Alpine White