First time poster. I recently bought a 95 4runner I just did a complete brake job, even replaced the Master Cylinder and the brakes dont seem to want to stay pumped up. i.e. driving down the road and pump the brakes to build up pressure when i let off and try to aply the brakes again my foot goes straight to the floor and i have to pump them up again.

I have checked for brake fluid leaks and have properly bled the brake lines (not my first rodeo) but I am baffled at the problem. Any Help would be appreciated.

 

It takes a while to get all the air out . The side the LSPV is on takes like forever.

Or one of your connections is sucking air but the fluid loss is so slight you don`t see it.

Are you using a vacuum bleeder or pressure bleeder?

 

Prolly need to adjust the rears up.What do you mean by complete?DETAILS

 

This is a pretty common issue, one of the bleeder valves is faulty or not fully closed. It will pass air but not fluid.

Yeah sorry but, Do it again

There is I believe a thread here about these sucking air also.