Question about 1997 Jeep Wrangler

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I have very little brake pressure in my pedal after days of bleeding and replacing the master cyl, rotor, and caliper. The rear drums seem to be in good adjustment. I see no leaks and when the engine is off i get solid pressure build up in the pedal. Engine goes on the pedal travels almost to the floor but builds up pressure if I pump it. The brakes do work but not the way they're suppose to.

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  • Richard Scordino Jun 06, 2010

    "normal" brakes or ABS?

  • randal3 Jun 06, 2010

    normal brakes

  • randal3 Jun 06, 2010

    wow.. are you online right now? that was quick. Um.. i have a 97 wrangler, its been though it all but Im no stranger to fixin it up when its broken. This one has me stumped. Changed the rotor after hearing a scrape noise (no biggie.) the caliper looked like shi* so I swapped that out for a new one (lifetime warnty) bled the side with the swap and got no pressure. Changed the master cyl next and bench bled then replaced then bled the whole system starting with back right back left, front right front left. No visual leaks, solid pressure when engine is off, and the rear drums seem to be spot on in their adjustment, (just checked em about 10 minutes ago)

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  • Jeep Master
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Try "gravity bleeding"...to do that you attach a small diameter clear plastic howe to the bleeder valve (I use fish tank air supply hose...if it doesn't fit you stick the end in hot water and just shove it on) Open the bleed valve and put the free ind of the hose into a glass jar with a bit of fluid in it (deep hose end submerged) Open the master cover and let the fluid drain into the jar, till the master has been re-filled twice (don't lot it run dry though) Close the bleed valfe and repeat in the pattern you used before.
Unless the fluid comes out really horrible looking you can keep re-using what you drained to re-fill. If you do this and still don't have anything, I'd return the master as it may be defective.

Posted on Jun 06, 2010

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