Re: urgent please help
Also check to see if your brakes are working, maybe a pad that is jammed up and not moving freely, or by some chance the caliper is not mounted properly, or even maybe the wrong style pads, try to move each of the wheels while applying the brake pedal, if the wheel moves with it pressed that means the pads are not seating right, or are hanging up, the whoosh sound you are hearing maybe also the power drum for the master cylinder, the shaft/plunger assembly I think is inside at the firewall this is the area that sound would come from, which could be a master cylinder. So check for any leaks, and check to see if all your wheels will lock up with pedal engaged, then go from there.