theflatlander

iTrader: (3)

Replaced everything but the master cylinder, brakes are bled perfect, wont hold any pressure in pedal. It will build pressure if pumped but wont hold it. Thoughts?

imloggedin

Whats everything? And why havent you replaced the master cylinder, thats a very probable cause.

theflatlander

iTrader: (3)

brakes booster, line going from booster to hardline(checkvalve included) line from hardline to motor, new, pads rotors etc.

Go48

iTrader: (7)

Bleed 'em again, RR-LR-RF-LF. Sounds like either air still in the system or a faulty master cylinder piston/seal.

misterstyx69

iTrader: (142)

I agree..either Air or a faulty master..If you do it in the way that GO48 says,it will get the Air out./..Bleed the Hell out of it..Say 5 times a piece..

theflatlander

iTrader: (3)

there is no air in the system. this isn't the first time i touched brakes. Just never had this problem. Ordered a new MC. thanks

alexdimen

iTrader: (13)

If there is a general poor feeling to the pedal, then it is usually either air or something on the master side of the system.

If the booster holds vacuum and the brake response doesn't feel erratic (touchy or non-linear response) then it's probably not the booster.