Had my s1 rs rollin roaded today
engine runnin well and had some new parts fitted etc
everything is as it should be now
only problem i have now is most times when comein off boost
the cuts out on me if it dose not cut out the revs drop right down and almost cuts out.
The tuning company said it could be the dump vale sticking

however i have removed it and blanked it off.


But its still doing the same.

There are no air leaks on the engine all the sensors are fine and working well.

The fuelin is set now and car drives and boosts well.

What could this be down to ???????????