I just pulled my car out for the summer and after driving it for a couple days my brake pedal only had about a half inch of travel. My brakes were stuck on. The only way to relieve the pedal was to let air in the line. Over the winter I put on a new master cylinder and brake booster. After I bleed the system it will be ok for a few days then it reverts back and the brakes get stuck on. It seems like a vaccuum problem with the booster or something, because the brakes work fine when they work. Just the brake pedal has no play sometimes and they're stuck on . Help!!!

-Eric