brake issue

[delsolsi]

ok when i picked up my accord the old owner only drove the car about 20 miles a day and he told me that when the ac was on that the brakes would lose pressure..well there was like no brake fluid so i filled it and bled the lines..now when the car is runnin for like the first 10 mins i have brakes with or without the ac after that the pedal goes to the floor...wondering if anyone has had this problem and if so should i change the master or the brake booster trying to not just throw useless money into it if not the problem.can anyone help

[sleepycb7]

sounds like the master cylinder to me.

[delsolsi]

thats what i was thinking but people keep telling me the booster being that it was not all the time

[sleepycb7]

loosing the booster would make a hard stiff pedal.

[delsolsi]

well im going to try the master tomorrow and hope that works brakes and master,and full bleed hopefully will resolve my problem i hope thanks for the help

[EJX_Michael]

does it have ABS? If there is a wire short somewhere between the AC and ABS it could cause the problem by messing with the actuator.