On my car when im sitting idle or coasting there is a hiss sound coming from under my dash at the pedals. When I put on the brakes the hissing sound stops, and when I accelerate the hissing stops also. What is it? My brakes work perfect also.

 

Never mind, I just read it could be the gray bellow in the fire wall to the brake booster is bad, ill try some atv sealant and see if it stops

 

I just went outside and looked under my dash and the grey billow was pulled all the way off. I pushed it back but I 100% doubt it will work. Anybody know where I can order a new power brake booster? It does have the DTSC.