Hi all

Mk 5 2l GT TDI 2004 138Kmiles.

Had the turbo replaced after the original one started to "whistle" with a reconditioned one. As suspected there was damage to a vane.

Now there is no issue with power, however the car idles roughly and I've just got a feeling that the car is "rough". This came after its MOT and all filters being replaced

Should anything have been adjusted (idle speed) as a result of a new turbo being fitted.

Thanks in advance.