well i have this problem with the pedal being spongy . i bleed it one day and it's ok for a day or two. the pedal is stiff the braking power TO ME is awesome (since this thing always brakes like **** ). well the whole system is new and no fluid is ever lost. i first thought it might have been a leak but now i am doubtful. i am thinking of selling my 88'. this problem has been persisting and even those dumbass brake shops can't figure out what's wrong. it has the pbr setup in the back. well guys i hope some has some words of wisdom or encouragement. if not i might have to say bye bye roc.

 

well i got another master cylinder. i have bench bled it properly and have installed it. i bled every line that went into and came out of the prop valve. i have bled the rear brakes with ease... sorta. no air in them. now for the front.... the front are being a PITA. they have a hella amount of air. lots of little bubbles. i have been bleeding them for about 20 min and still the little bubbles persist. does anyone have an idea what might be wrong? i have checked all the lines and no signs of leaks at any junction. can you guys help me out here? any help is appreciated.