I've just unplugged mine it it make no difference what so ever to th idle My bro inlaw has compleatly taken it off and binned it and it made no difference to the idle what does make a difference is if you adjust the idle screw and if you put your fingers over the holes inside the throttle body, i dont care what people are saying it is on tgtt there wrong to. It is 100% not the ICV, will even get a vid of My car running and disconnect it and plug it back it if you want if you unscrew it off the throttle body and put your hand over the hole get someone to start ya car it will idle as normal try it, please try it just to prove me wrong!!!!