Guys when I wanna slow down I press the brake and I gradually loose pressure and my foot ends up going all the way down towards the firewall, I need to keep pumping my foot on the brake to get more and more stopping power, whats causing this, my buddy told me it was my calipers going out could it be the master cylinder? please help...

 

First thing, check the fluid level. Then bleed the system. If that doesn't fix it, its probably the master cylinder

 

Hey I fixed my car, the problem was my brake booster was all gone no pressure, bought a new one at Oreilly's 75 bucks... problem fixed!!!