Question about 1994 Jeep Grand Cherokee

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1994 Jeep Grand Cherokee brake pedal goes all the way to the floor. Recently replaced calipers and master cylinder and bled the whole system. Brake pedal goes all the way to the floor when first pushed then after pumping they tighten up and if you wait a secon the brake pedal goes all the way to the floor again. What could it be?

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  • Jeep Master
  • 2,899 Answers

Sounds like a bad or empty Master cylinder or slave brake system leakage . Check the master for full brake fluid. Look for leaks at each wheel.
Maybe the system has to be bled.
Hope this helps.

Posted on Mar 14, 2015

Not bleed properly
or you have a rusted out line (leak)

There is NO Procedure-- that when driving a
vehicle or bleeding brakes,do you ever pump them

Posted on Dec 03, 2014

  • 1 more comment 
  • Nikka Johnathon
    Nikka Johnathon Dec 03, 2014

    Yes we pump them

  • Nikka Johnathon
    Nikka Johnathon Dec 04, 2014

    No rust on lines lots of brake fluid in fhe resivior

  • Anonymous Dec 04, 2014

    All your doing apply brakes is to slowly move the brake pedal Then the piston in the master moves but less than an inch (that is all there is to it) in order to build up to 1,000 lbs pressure in the system So NO Pumping not required & doesn't do anything,could cause harm possibly Bleed the system you will have brakes that work

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Posted on Jan 02, 2017

emissionwiz
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SOURCE: brake pedel pushes to the floor

pump the pedal about 10 times and see if it comes back up, u need to pump the caliper pistons out after a brake job.

Posted on Jun 27, 2009

emissionwiz
  • 75066 Answers

SOURCE: brake pedal dropping to floor

do u have the antilock brake bleeding tool? if not you will need to have the dealer bleed the brakes, the ABS control valve must be electricaly held open to bleed the brakes there of course is a special tool for this.

Posted on Oct 18, 2009

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SOURCE: brake pedal goes to the floor

check vacumn and\or connections to the vacumn boost cannister.

Posted on Apr 21, 2010

  • 975 Answers

SOURCE: brake pedal goes to floor on first depression; then pumps up fine

Try this,apply the emergency before stepping on the brake.
If this helps the pedal,the rear brakes are out of adjustment.

Posted on Jul 01, 2010

johnjohn2
  • 5763 Answers

SOURCE: 1997 Jeep Grand Cherokee Brake Problem. Brake

This may sound dum but its been done a few times and is a simple mistake , the bleeder screw is up top, with the caliper on the bleeder screw should be up top, if not then calipers are on the wrong side, it sounds like air in the system, also you pumped the pedal up to push out the piston so pads hit rotor after bleeding,i dont see anything else, if the pedal is good with pinched lines at caliper then it got to be calipers are wrong or on the wrong side and the bleeder is not atop caliper,also you bleed the rear also? these trucks and cars use left caliper and rt rear on one system of the master and rt front and left rear on one side, let me know about the caliper, heres a picture to show you what i mean. hope this helpsjohnjohn2_23.jpg

Posted on Nov 16, 2010

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I've had the same problem before, ended up being a bad master cylinder that I just purchased. Replaced it with a different brand and it worked fine.

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Time to redo the bleeding of the system again...starting with the master cylinder...you do not have to remove the master to re-bleed it. disconnect both brake lines from the master, and start again by pushing pedal to floor, and rebleed each line at the master...this is critical to work properly...you mentioned new master cylinder, if remanufactured I would return it. As noted above, after confirming the master is fully bled...rebleed each caliper beginning with the rear, farthest away from the master...you must have "air" in the brake lines. Hope this helps.

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This may sound dum but its been done a few times and is a simple mistake , the bleeder screw is up top, with the caliper on the bleeder screw should be up top, if not then calipers are on the wrong side, it sounds like air in the system, also you pumped the pedal up to push out the piston so pads hit rotor after bleeding,i dont see anything else, if the pedal is good with pinched lines at caliper then it got to be calipers are wrong or on the wrong side and the bleeder is not atop caliper,also you bleed the rear also? these trucks and cars use left caliper and rt rear on one system of the master and rt front and left rear on one side, let me know about the caliper, heres a picture to show you what i mean. hope this helpsjohnjohn2_23.jpg

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Brake pedal goes to the floor


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Brake pedal dropping to floor


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STILL DOESN"T WORK!!!


you need to use a pressure system to add fluid into the master cylinder and then bleed it.

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