Hello, I have a 1994 XJ6. Initally, the front calipers were frozen, so we replaced them. After attempting to bleed the rears, the bleeders broke, so we replaced the rear calipers as well. After bleeding all the air out of the system, the pedal still goes to the floor. We replaced the Accumulator & Pump, and still no luck. What happens is we can pump up the pedal and get a good feel. After you release the pedal, and wait about 30 seconds, you lose the pressure and the pedal goes right back to the floor. I am stumped with thi problem. The only other thing I noticed is that the is alot of fluid moving upwards in the master cylinder while pumping the pedal. Could this be our problem? Any help would be greatly appreciated. Thanks in advance for the replies!

 

We replaced the Master Cylinder today, and still the same problem. It is acting like somkething is letting the lines lose their pressure. Thank you for the reply. I'm still trying, so any other info would be greatly appreciated!!

 

Anybody have any ideas????????

 

Okay. I bled the brakes several times. I get normal bleeding action at all 4 bleeders. The rears are bleeding the way that they should, with the acumulator pump, and the fronts bleed normally with plenty of pressure. Like I said in my original post, it is as if the lines are losing their pressure after a few seconds of being off the pedal. You can pump it up and get a good pedal, but as soon as you stop and wait a few seconds, and press it again it goes to the floor. I have Alldata, and have done everything the way it instructs you to, as far as bleeding goes. I am so frustrated with this car, it is driving me nuts!!!