So I been having this cold idling issue with my car where it revs up and down for a couple minutes every moring, sometime it will stall out. So i have found and fixed some vacuum leaks which have improved the issue but not resolved it. But recently there has been fuel cut off when I give full throttle and the turbo hits at about 3000 rpms . . . no fun. I have read that this means there is either a vacuum leak causing more air to go in or the solenoid is faulty. The thing is that the cold idling issue has been going on for months now so it wouldn't make sense if the vacuum leaks (lets just assume the vacuum leaks are the issue) causing the cold idling issue are now suddenly causing the fuel cut off issue. So I think the solenoid valve needs to be replaced but I'm wondering if you have a faulty solenoid could it cause vacuum leaks?