brake problem 78 280z

[Zrod]

when i apply brakes it seems like only the front brakes are doing the stopping. all brake components have been replaced except rear rubber hoses. i noticed that when i was bleeding the rear brakes i had a hard time getting brake fluid to flow into vac. cup. any help is appreciated. 1978 280z

[Jeff G 78]

Bench bleed the master cylinder. Take a 6" hose that fits tightly over the bleeder and loop it from the front MC bleeder port into the reservoir. Open the bleeder slightly and have someone SLOWLY pump the pedal while you watch for bubbles. It takes less than a minute and you will either confirm, or rule out the MC. If you get good solid fluid flow with no air bubbles, you either have debris in the hardline or distribution block, or you have collapsed rear hoses. My guess is that the MC has either air, or a bad seal.

Edited June 19, 2009 by Jeff G 78

[Zrod]

thanks jeff, i'll try that and let you know what happens.