Sorry I am posting again on this, but really need this fixed. On my 98 SE under the dash where the brake pedal shaft goes into the firewall, there is a loss of air around the shaft. I can hear it go shhhhhhh when I push on the brake pedal. It allows the brake pedal to go to far to the floor. If I pump the brakes once, the pedal is better, but still goes shhhhhh, losing air. This is what I think is causing a whistle sound also. We have done a complete brake job, including complete bleeding. Please tell me if this is an easy or dificult fix or if I can let it go, or if this is dangerous. My daughter leaves for college in a week. Thanks.