audi a3 2005 brake pedal hissing noise


Registered User
hi there can someone tell me why im i gettin this hissing noise when i press the brake pedal feels like air comin out little bit i didnt have this befor i got this hissing noise only after i fitted my new turbo last monday the brakes works fine i found this problem only this evening when i come from work when the car is turned off the brakes pedal feels strong firm when i turned on the car i keep pressing the pedal feels hissing when i press half pedal can someone tell me why please thank you i will ring the garage guy tomorow