I dunno, but from what I've read, the only thing that the whole "stepper motor" and it's associated wiring, etc. does, is raise the idle a tad, for cold start-ups. Seeing as how I've already remove the secondary butterfly's, I might just take BOTH of these motor doo dads off completely, and toss them on a shelf. I have a good throttle lock/cruise control device that will hold a fast idle, "IF" I need it. I also know when I take off the things, I'll probably wind up with a check engine light, but not sure?