Ive got a 2005 jetta gli, just got it 3 days ago. this morning something went wrong, the engine shakes alot at idle and when acceleration in the first couple gears, when at driving speeds it seems normal. worse if the AC is on. i hear the turbo whistle, but it does not boost the vehicle. very sluggish acceleration and shakey engine again when i accelerate.... any ideas? i feel like im driving a scooter....

please help if you have any clue.

Erik...