well the imrc is a funny thing, I was having issues where I felt that mine had stopped working, no high end power. I removed the pretty cover for a few months and it started working again, its been awhile and it all seems good. I never got a CEL either when I felt it died. I confirmed that they had stopped working when I unplugged the controller and the car felt the same as if they had failed. After my recent intake rebuild I haven't noted any issues and there was never a problem with the linkage.