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Soft pedal on 03 grand caravan

Changed the master cylinder, front pads and rotors, and the pedal is really spongy, after changing the master cylinder again thinking i had a faulty master, its still the same... i have gravity bled the brakes, and have power bled them... what would cause it to stay spongy?

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  • Cars & Trucks Master
  • 5,332 Answers

Have you driven it since the brakes where replaced?

Did you bleed all four wheels?

have you "broken in" the new pads?

Are the rears drum or disk? If drum are they adjusted correctly?

are you using remanufactured master cylinders? If so keep replacing them. eventually you will get one that works. New is pricey but a better way to go.

Posted on Jan 22, 2013

  • 9 more comments 
  • felixarndt26
    felixarndt26 Jan 22, 2013

    the rear are disk, and we have put 2 new m/c on since this problem, the pads were broken in,the m/c was properly bench bled both times, and the bleeding sequence for this vehicle was done properly.. what are the chances of it being the abs module, or the brake booster itself? and also is the any other way to bleed the abs without having to use the scanner? thanks

  • Jeremy W.
    Jeremy W. Jan 22, 2013

    You shouldn't have to mess with the ABS module. If it where the booster than the pedal would be really hard. Why did you replace the master cylinder?

  • felixarndt26
    felixarndt26 Jan 22, 2013

    we replaced the m/c because the pedal was spongy.. it just gradually hits the floor... but it doesnt leak any fluids under the chassis... then whats the possibility of it being faulty calipers seal? the vehicle only has 21K, but it is used on base where its constantly stopping and going?

  • Jeremy W.
    Jeremy W. Jan 22, 2013

    The new master cylinder feels the same but no longer hits the floor, correct?

  • felixarndt26
    felixarndt26 Jan 22, 2013

    same everything

  • Jeremy W.
    Jeremy W. Jan 22, 2013

    Do you know the brand name of the master cylinders or where you are purchasing them from? Your sure they are new and not remanufactured?

  • Jeremy W.
    Jeremy W. Jan 22, 2013

    The pedal goes to the floor while driving or it does it in park as well?

  • felixarndt26
    felixarndt26 Jan 22, 2013

    found the prob.. it was a bad seal in th caliper

  • Jeremy W.
    Jeremy W. Jan 23, 2013

    Hats odd that youndidntnsee signs of it leaking? Glad you figured it out!

  • Jeremy W.
    Jeremy W. Jan 23, 2013

    Lets try that again only legible.....that's odd that you didn't see signs of it leaking? Glad you figured it out.

  • felixarndt26
    felixarndt26 Jan 23, 2013

    it wasnt noticable ... the only way that i found it was by clamping the lines off and then releasing the clamps one by one to find out which one ws letting the pedal go to the floor... appreciate the help

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Posted on Jan 02, 2017

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  • 65 Answers

SOURCE: 2005 f150 spongy brakes

it sounds like your still not getting all the air out of your lines. it helps to have a brake bleeder but they are expensive, it also could be that the gasket inside the master cylinder is inverted even if it is a new master cylinder this could be the case, ive had four bad remanned ones in a row, before i got a good one... hope i could help

Posted on Mar 24, 2009

wracefans24
  • 1985 Answers

SOURCE: 1997 GMC Sierra 5.7 changed master cylinder

check under your master cylinder,is there another clyinder below with one line in and one line out,if you do I found this is for the Abs to the rear,I had to replace this it was full of air,and did exactly what yours is now

Posted on Dec 09, 2009

  • 19 Answers

SOURCE: Spongy brake pedal even after ABS bleed and base brake bleed.

Did you adjust the rear shoes out? If the rear drum brakes are out of adjustment they will give you a lot of pedal travel. If the pads are worn have no fear of that U-CLIP brake spring, just change one shoe at a time. Take the spring off one side, change the shoe, put the spring back on the post and do the same to the other shoe, no problem.

Posted on Dec 19, 2009

  • 635 Answers

SOURCE: Spongy brakes

So long as the brake booster is working, test it by turning on the engine, press the brake pedal all the way down, then shut off engine keeping your foot on the brake pedal, if the pedal comes up slightly pushing against your foot then the booster IS working.

Did you BLEED the brakes??????

Posted on Mar 29, 2010

  • 1 Answer

SOURCE: Brakes are still spongy after changing the pads, one caliper, and master cylinder. bled front brakes.

I just went to Brake Masters this morning and had them replace the Master Cylinder since I was experiencing the pedal very spongy and going to the floor. When they replaced the Master Cylinder and they gave me back the car, the brakes were still spongy and going to the floor. I addressed this to them and they took another look at it, but when I took it for a second time, the brakes were extremely spongy. It was almost like they gave me back my car in worst condition to when I brought it in. Can you help?

Posted on Jul 31, 2010

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