okay today i found that my brake pedal was stiffer than normal. hard braking it pulled to one side. well i thought it was caliper locking up so i jacked it up and sure enough driver side brake was sticking. So i was headed to auto store to get a new one and thought crap i need to check other side to so i pulled over jacked it up it was doing the same as driver side so i then jacked up driver side to see what was up well then it was feeling normal what is up?

 

proportioning valve.

 

Could be the master cylinder sticking also or a pinched steel brake line. If both are sticking at the same time, check prop valve, MC, and lines.

 

cool well i changed both calipers and seems to be working fine. if problem comes back ill check into these things! Thanks you all

 

check the vacuum hose that goes from the booster to the manifold.
otherwise, it's most likely the booster gone bad.