i was not sure how to title this as im not entirely sure how to word my problem either. lol. But i will try as best as i can to make sense.

I have never encounter this before in a car or truck.

today when i was coming home from work every time i would press the brake pedal i could hear air wooshing. the pedal was not spongey or have any different play in it that i noticed. and then a few miles down the road the air wooshing was constant, but more noticeable when i would press the brake pedal.

i checked the brake fluid, and the vaccume line at the mater cylinder, and everything seemed fine, any thoughts?

 

Brake vacuum booster is on it's way out.

 

whoopie. thats what i thought it may be..

 

Ditto on the vacuum booster. Fortunately they're not that expensive, and relatively easy to change.