[pstoric83]

Is the vacuum tube the large rubber one connectiing the throttle body to the air box?

And about the wd40 thing, it's weird because whenever I remove the idle speed stepper motor (the 2 torx screws and has the small plunger on the end) to spray it with wd40, it's never dirty. For some reason lubricant seems to stop the issue, maybe it's inside the throttle body? I don't think using carb cleaner on that part will do much because it was replaced recently and looks brand new.