[ABQTT]

Why does my car sound like an owl when I accelerate?

On your Turbo-charged car, there are a few special pieces that N/A cars don't have, a Blow Off Valve or BOV is one of them. Your BOV acts as a pressure release valve for your car. When your turbos produce boost, it flows into your combustion chamber, when you let off the gas, the Throttle Body plate closes, but there is still boost trapped in your lines leading from the turbos to your Throttle Body, this is where the BOV comes into play. Instead of the boost flowing back into your turbo and causing backspin or compressor surge (your turbos violently start to spin backward...VERY BAD)your BOV opens and the boost is released through this valve. (That is the whoosh sound) When you are accelerating and you hear a hooting sound, it usually means that your BOV is leaking (releasing pressure when it should be closed) There is really only one fix that I know of which is to replace the BOV. It is located coming off the Y-pipe and connecting back to your air-splitter (If anyone knows the technical term please add!) behind and under your MAS.