Saab 95 Aero (2.3 HO) lost lots of power: when accelerating turbo indicator remaing in green zone and engine doesn't create any torque. No other symptoms. I noticed earlier, that during extreeme acceleration at about 5500 rpm torque was rapidly dropping, but I attributed that to 'normal' behavior. Now I think it was the same problem but not in such severe form as it is now.

If anybody seen the problem - please let me know what was it.