I have a 2000 turbo on a x reg and ive noticed every now and then when i accelerate the car pulls then holds back at the point that the boost gauge is changing from vacuum to boost 0bar. If you back off then accelerate again it pulls all the way up the revs.When it holds back there is a what can only be described as a vibrating sound and sensation from the passenger side of the engine does anybody have any ideas cheers.

 

Coilpack breaking down?