After a PITA break down in France last week, the saga seems to be over now I have refitted the EGR valve properly.
However, I still have the whistle/whoosh sound when the car is warm and the boost is on full.
Sounds like I have some massive hybrid turbo fitted, which I don't!
Car runs very well, smooth pick up and power delivery. Much better than it has been since I've had it to be fair. The new EGR and MAP sensor have obviously sorted something that had been a problem.
When I fitted the EGR back, I checked around the turbo and pipes. Noticed quite a bit of gunk and mess on the pipes, so cleaned up a little.
Went for a blast round the block, as I said, heard the whistling noise when on boost.
Got back and took the photo below, oil seems to be coming from somewhere. The area where the wet oil is was clean before I went out for the blast.
Would this be an oil seal? Maybe causing the noise?