Lazy 1st / 2nd turbo issue

[fuldhat]

Hi All.

 

My TT-6 from 1993, has a slighty annoying issue, where the first and second turbo can be a bit lazy to come online.

 

So when driving normally and then give it half/ full throttle, then sometimes you need to "pump" the pedal for the 2nd turbo to start boosting and when pulling away from stop, then the 1st turbo sometimes dont want to boost, and other times it works fine.

 

So I suspect the VSV`s to be faulty or the larger "valve" in the exhaust to sticky.

 

Am I right on this, and could someone please post the Part numbers for the VSV`s.

 

Thanks.