Volvo: Volvo 850 turbo engine, engine roar, volvo 850

Question
I have a 1994 Volvo 850 turbo.  I recently notice that when i try to accelerate to high speed , sometimes the engine shakes an then if i let off a little it takes of...so you know why that is?   

Also, when i reach speed of around 40 i start to hear deep humming/buzzing sound around the turbo but i still hear the spool of the turbo(not the good engine roar sounds , but something bad and different sounding).Do you happen to know what these problems may be?


Answer
Ben,
Go to a shop that works on Volvo and let them hear the noise you discribed. This is something that you must see and hear to be sure what is going on. My guess would be broken turbo intercooler hose(s), causing lose of charge air to the engine, thus low power.