OK I have used the search function and can not seen to find a answer..
So I replaced MC, Both Calipers, Rear Brakes and adjusted rears with a little drag in them..
I have bleed these thier is no air in any lines and have bench bled MC..
This is all on 89 Cherokee..
My pedal gets hard when engine is off as soon as I start it I have almost no brakes..
Any help would be great
Brad

 

calipers on with bleed screws at the top and you bleed in right order

 

yes I have done all that

 

bad booster

 

try pushing the pedal down keeping pressure on the pedal does it stay or is it creaping down when pressure is applied

 

booster gets hard when motor off then when he starts the pedal goes down that means it working proprley... 30 year automotive experience....

 

i had same problem on my 89 after front brake job.

bled and bled with same problem, finally used a vacuum bleeder and that worked.

 

 

It is not booster , pedal stays hard till you turn engine on then it goes to floor...
the proper bleed sequence is rr.lr,rf,lf??

 

you have done brake jobs before right

 

right, do the pedal does it creep down

 

Yes it just drops down with in a second or two of starting engine.. thier is a little brake pressure
I have done brake jobs before ..

 

no no no with the vechicle not running just push the pedal down untill you feel resistance keep pressure on the pedal is it creeping down do not start it just push the pedal

 

no it is a steady pressue

 

the rear brake regulat the height of the pedal when they are adjusted proprely the wheel should spin maybe a half to three quarters of a turn when rotating by hand is this how they are adjusted