When i step on my brakes u hear a loud air noise and they are hard to stop

The seal to your power brake booster is bad, booster sit under hood, master cylinder bolt's up to it, you do not need to disconnect brake lines from master cylinder, remove two 15mm nuts that hold master cylinder and set aside, remove 4 nuts under dash and linkage to brake peddle. replace brake booster.

You need to replace the pads or u have a hose or line busted which immediatly needs to be replaced.Hope this helps and Thank You for asking.