What wrong with my breaks

Question by Sean1983ss posted 11 months 3 weeks ago in 2004-2011 (2nd gen)

My break petal almost falls to the floor when I apply pressure to it and makes a wooshing, wind blowing, sound. The petal won't tighten up either. But with the car turned off the break petal will tighten up when pumped, but car turned on nothing but the petal is going to the floor. Why?