I pulled into my driveway last night and I'm getting an air leak hissing sound when I turn the steering wheel. It is worse when I am not moving and the sharper I turn it. It will stop after a small period of time and will start again as soon as I turn it again. Alright, so I go outside a minute ago to test it and try to figure out the problem. Power steering fluid is fine, no leaks or fluid anywhere, no loose hoses, etc. that I can find. I took it for a test drive just down the street and it is steering fine and once going only makes the air sound if it gets turned fairly sharp? Here's the crazy thing...I was driving very slow in one of my neighborhood end circles and while it's hissing/air leaking I applied my brakes and the air leak sound stops immediately. So, I pull into my driveway and while sitting stopped I turn the wheel then apply the brakes the sound stops but the steering locks up as well. It doesn't actually lock it just gets to where you can't physically turn it while the brakes are applied. WHAT the heck is going on here?? What do I need to do?? Can I fix it myself...what do I need to look at? I'm lost!! Thanks!