I have a 2002 tundra when I first step on brake pedal I hear a fast woosh of air it sounds like its come from vacuum booster. its not like a vacuum leak,well not 1 that is constant vacuuml leak . is my brake booster bad
How does the brake pedal feel? Do you have to push harder?
Stick your head in the engine bay while someone pushes on the pedal and try to find the source of the leak