Alright have a wot shutter all of the sudden driving to work. No problems at idle or normal driving until getting into 10 lbs or better boost. I pulled up to work swapped out known good Maf. Still no change looked for a vacum leak did not find one alittle puzzled right now. Any ideas Car ran very well up until now. Stuck at work for now can't really mess with it right now. I can just cruise the car home and take out one of the other cars.