[urq] Stopping Power: 100%- 50%- 10%- FOLLOW UP

Brandon Rogers brogers at terrix.com
Tue Apr 19 11:02:45 EDT 2005

I still think it is your master cylinder or a air bubble in the system....

Do you use rubber brake lines - how old are they?  I understand after 
several years they can get more flexible and expand when you press the brake 
pedal (causing mushy pedal)....


----- Original Message ----- 
From: "Maurits Jonkergouw" <urq at moregraphics.nl>
To: "Audifans" <urq at audifans.com>
Sent: Monday, April 18, 2005 4:35 PM
Subject: [urq] Stopping Power: 100%- 50%- 10%- FOLLOW UP

Hey guys, remember my brake problem last week? Well, I changed the bomb and 
filled the PS reservoir with new ATF Dexron II. Ran engine a few minutes and 
bled the system (by locking the wheels from left to right 5 times -wheels 
off ground- and topped it off to maximum). Ran engine for 5 minutes again 
but the pedal is still soft. As a matter of fact it's feels exactly the same 
like before (no brake feel).

When I turn off the engine and push it 8-10 times, it gets harder but never 
really hard, like a faulty bomb, even after +25 times, at this point the 
pedal feels quit normal, like it used to, only key difference is the engine 
is now off. When I restart engine, the pedal becomes soft and mushy again, 
just like before... :-(

When I quickly "slap" the pedal numerous times (while engine running) 
without pushing it all the way to the floor, I feel counter pressure does 
come back, if I then push harder, I'll step right thru it, straight to the 
bottom again, making this prrrrrtwhooooosch sound, like the sound of a wet 
fart or baby shitting his/her diper.

I'm no expert on brakes and hydraulics, but something tells me is seriously 
wrong. All I do know there are several possibilties left:

Hydraulic pump (but sounds good to me);
Master Cylinder (already bought rebuild kit);
Proportional valve;
Servo leakdown (saw no red puddles yet);
Pressure regulator (sweating at lower warning switch);
Pressure acumulator aka the bomb (fixed that).

Brake bleeding will be the next step, but perhaps it's already obvious 
what's wrong?

Thanks again and again and again. Getting little anxious what might to 


1986 GV (Swiss WR)
1985 CGT KV
1982 GL DD

Audifans urq mailing list
Send posts to: mailto:urq at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
Have an urq question?  Check the Audifans Knowledgebase!
Have an urq answer? ... Please help others by adding to the KB ... all 
contributions welcome! 

More information about the urq mailing list