Hey guys, im stumped on this one... Ive always had problems with my brakes since ive got my jeep. I just recently changed all of this:

Brake booster & Master cylinder
New brake hoses front & rear
Calipers in the front
Wheel cylinders in the rear
Brake pads front, Shoes in the rear


What else could it possibly be?? I have bled the brakes so many times trying to make them work. I figured i was bleeding them wrong so i took them to my dads buddy that does out side work and he said he bled them and they still hit the floor. I re-bled them last night after i changed the front brakes and rear hoping for some progress. And nothing... Could me new booster or master cylinder be bad? Im not leaking any brake fluid AT ALL! Fluid level has been the same for weeks on weeks and i check underneath and see nothing. Please help :/ Its starting to get a little dangerous driving this thing.

 

Did you (bench)bleed the mastercylinder before installing? And did you bleed the valve block the mastercylinder connects to? I had similar issue and after bleeding that, things improved (still have squishy brake pedal), but I didn't know of this bleeder untill I was pointed to it. It's on the valve 'block' facing the front (has a little rubber cap on it, if still there)...

 

There is a rod coming out the front of the booster and into the rear of the master cylinder. It is adjustable.

 

If you pump your brakes with the jeep off does it build pressure?

 

what about brake lines? they can also mess up braking performance, after years of usage they become useless and expand as you press the pedal.. replace them if you haven't

 

Were rears adjusted ? Did you bleed in sequence ?

 

x2 on the brake rod between booster and master.

also, are the calipers on correctly, as in, bleeders above the lines?

 

You said you replaced the calipers, were they installed on the correct sides?The bleeder screw will be facing up. If the screw is on the bottom, it will trap air in the caliper. Ive made that mistake before some how, felt like the worlds biggest idiot to

 

I'd go with cruiser and filed. Check rod for adjustment and did you bench bleed the master?

 

Aah...that magic rod. Cruiser, I can recall a similar thread regarding my squishy brakes....am about to swap in my new brake lines, see if that changes anything (after swapping in a new master cylinder didnt...)

 

OP has been AWOL for 4 days now.......

 

He's got plenty of questions to answer by now...

 

Are your bleeder on the front calipers on the top?. I have seen some people put them on the bottom not knowing and they are then on the wrong side and will never bleed. Bleeders must be on top.
#2 Did you adjust the pin that contacts the MC hole from the booster. That can make a big difference if it is sticking out too far or not enough. You have to measure it so it just barely touches when the MC is touching it.
#3 The Valve on your booster with the hose going to the intack can be bad. Pull it out and test it by blowing on it both ways. Should closed one way and not let air through as in a check valve.
#4 portioning valve may need to be reset but unthreading the brake light centering switch in the middle and with something pointy look down inside the hole after you unplug the wire and unscrew the switch then move the valve to the middle or get the centering tool on amazon but get the plastic one. Because the ones they sell are too big. I took the plastic on and use a die to grind it down until it fit same size as the switch. HTH