Hi

i have a 1999 tdi bora - its a 110 with AHF engine and for a while the performance has been down but the problem manifests in two ways.

Firstly - 1st & 2nd gear performance is slower than it used to be - as if there is no turbo. However, once up to motorway speed, the performance is ok... in so much that you can feel the turbo kicking in when accelerating from 50-70+

Secondly - under light acceleration (say at 65mph) and when the engine is under load, the engine can go into limp mode.

I suspect the two are the two related. Are the vanes on the turbo likely to be stuck or is this likely to be a vacuum related?

I appreciate this will require further investigation but would like to know the possible issues. The Engine has covered around 150k but for the last year - town trips only...

Thanks!
Phil