SwaintaN

Ok I flushed the system, old fluid out, full synthetic in.

Before flush/bleed if you pressed the break it slowed down, but if you wanted to STOP you had to press let go and reapply very quickly!

now its only slightly better.. i did two person bleed and flushed it.. is there something else I should be looking at?

looking to get them to stop when i press them. or at least better then it is now.

lewissa81

If you have to pump the brakes, that's a pretty good sign the master cylinder is shot.

60DRB

...or there's air in the lines.

SwaintaN

I'm thinking no air. I bleed all 4 with what was in there then a full big bottle of AAP synthetic them finally finished with valovaline synthetic. No air from what I saw.... my fear was master as well.

Also was thinking since it looked newer he might not have bench bleed.

Summers22

iTrader: (2)

Gravity bleeding is the most sure-fire way to bleed brakes.

4x4Fun

Stating the obvious, but at times overlooked... Also check for leaks. That will remove the preasure in the lines as well.

SwaintaN

i checked for leaks while i was under there, cause that was my first thought, was maybe a rusted out pin hole

Especial86

iTrader: (1)

Could be an air leak through the threads of the bleeders.. A dab of grease around the threads, or antiseize will help keep them sealed while bleeding, and while closed..

Bleeding should be done with the master sealed and multiple refills. Brake fluid attracts water like mad (dot 3/4) leaving brake fluid open to air can introduce moisture to the fluid thus giving a soft and spongey feel..
Dot 5 can be known to aerate and become filled with tiny air bubbles, but won't attract water.

I know when I bled my system, it took about 4 separate bleeds and 2 big bottles of synthetic dot 4 before it felt normal again.

What DOT is your fluid? And was your fluid old or was the cap left off?

FordSilly

I prefer gravity bleed..
Did you have the spongy feel before your brake fluid flush?

spaseghost

Mine always felt like crap, real spongy and had to pump them up to really feel the deceleration. Thought it was due just to having 35's, so I replaced the pads and rotors and bled everything just to make sure, and it felt the exact same. Did some searching on here and I just adjusted the rod behind the master cylinder out 1 1/4 turn out and its like a whole new truck. No more having to pump and I can make panic stops now. Its a really easy process.