Hi,
I had a read through the post Cleaning Idle Control Valve . I am not clear when it says in step 9 " On the bottom of the AAC assembly there is a screw, this can be removed for cleaning and is generally the dirtiest part as this is the idle control screw. At all times when idling the tiny gap that the screw when in allows air to pass through keeps the car at its steady idle. It's no wonder there is so much buildup." and in step 10 "Also clean the idle valve screw (you'll see its hollow down its centre)"
There is an O ring covering that area. When I remove the O ring and there is a little hole. Should the hole be hollow?
Thank You