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hug13 01-05-2013 04:07 PM

strange braking problem
03 grand cherokee, just replaced the mc in my 03 gc limited 4.7 (thought this was the cause of brake pedal issues) have now narrowed problem of pedal nearly going to floor (no brake warning/abs lights). This only happens when going from reverse/stopping then going forward. Brake pedal goes almost to floor and then braking is normal after pedal returns.

Frango100 01-05-2013 04:29 PM

Re: strange braking problem
Welcome to the garage.
The brake fluid level is ok and did you bleed all air from the brake lines?

hug13 01-05-2013 04:34 PM

Re: strange braking problem
all wheels bled,no fluid loss, same issue with original master cylinder.

Frango100 01-05-2013 05:01 PM

Re: strange braking problem
There are not so many options as where the fluid goes to when you almost floor the pedal. Or the ABS system is letting fluid to return, or there is some mechanical problem on one of the brakes, which lets the piston go out more in certain cases.

dudefromflorida 01-08-2013 06:03 PM

Re: strange braking problem
I am assuming that you have looked at both front and rear brakes?

Make sure none of the calipers are loose (though I am sure that you would have noticed that by now)

Another thing to look for is to make sure that you have all the little hardware that is part of the braking any retaining pins or pad clips.

The way that you are describing it sounds like there is something loose in the system that is waiting to catch again when you change directions (even though there are probably about a million other things that it could be)

Keep us updated!

EDIT: Have you tested the booster? I know that it is a problem that does not always happen unless a certain situation, but it could be something worth looking into.

hug13 01-09-2013 07:07 PM

Re: strange braking problem
thanks for the reply found a really good site that may help teves mark 20 anti-lock brakes

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