GTT howling/siren noise on deceleration

[Lats]

GTT howling/siren noise on deceleration, have no idea what this could be, a tad worried about it.

[Ae92typeX]

can you locate a general area/direction it is comming from?

[Lats]

I jst took for a drive, lots of noises, lack of power, I think my Turbo has gone.

[Boosted_162]

GTT's warp their turbo manifolds.. Check this if you havent fixed it before.

[85AW20v]

Culd also be boost leaking out under pressure through a small split in a boost line. If you can get it to do the same thing while sitting still, you should be able to track it using a length of small plastic hose with one end in your ear and the other in the general area of the leak. Exhaust shops do the same thing to see if they've got any leaks. But be careful when you're getting close as it'll just about deafen you when you find the leak!!