I recently replaced the front calipers, pads, and rotors on my 1995 xj because the front right caliper froze. I bled the fluid properly and the brake pedal will still go to the floor. So I looked around and saw that my left and right rear wheel cylinders were leaking. I replaced those, bled the system, and the brake pedal still went to the floor. So I replaced the master cylinder, bled the system, and it still goes to the floor. Brakes are working now, but I have to push the pedal all the way down to engage them. Is there another part that could be bad? Could I have installed something incorrectly?

 

Could check for air leak with or possibly faulty power booster? But i would recheck all brake lines and bleed system again(all 4 wheels). Any warning light? How is the e-brake position? Before replacing brakes was there any issue besides being old?

 

Okay thank you I will look into the booster and double check my lines! E brake position is good. Found a rock in a caliper about an inch wide and also that caliper froze up due to corrosion, which is why I replaced everything.

 

also the warning light comes on sometimes when pedal is pushed to floor. When engine is off, pedal is fine. But as soon as it starts up, it will go to the floor. If it is the power booster, how would I replace that? Is it just a seal or do I have to do the whole thing?

 

booster is ok when running it does the work. mine did that, combo of bleeding, and rear shoes need adjustment. some cars loose pedal when rear brakes are bad in some way. i dont care if its a dual master cyl or not! loose back,pedal goes to floor.
i still need to bleed but im afraid ill break bleeders!!
still have soft pedal but i stop..

 

had the same issue.. did three things before properly re-testing

1) replaced brake pads - mine were cooked
2) tightened e-brake - was loose and movable while parked
3) bled brakes

no pedal sink and decent response, brakes still a tad soft though, will look into it further in the future

 

check to make sure you put the calipers on the correct sides. bleeders must be above the brake line or you will never get any brake pressure.
same as the rear wheel cylinders, bleeders always to the top.

i'm sure that's the problem, many have done the same.

 

shoot. You're right. Rookie mistake 😂

 

thank you so much you saved me lots of time and $$

 

I know a guy who had been wrenching on Jeeps for years and did that. Don't beat yourself up. It was suggested because it happens so often.

 

yrs ago i put new shoes on the front of a ford van. years later i had the wheels off and found 2 small shoes on one side, 2 big shoes on the other. i think i was drinking a bit much at the time!

 

yep. you are not the first, and definitely won't be the last.
glad you got her stopping again.