[urq] brakes problem

[Bill Bennett]

you have two problems, the hard pedal delay is a bad bomb. the pedal that ends up on the floor assuming you have no brake fluid loss is a bypassing master cylinder, the only thing unusual is for both to happen at the same time. Bill PS the known good bomb? what pressure did it retain after one pump engine off. did you test it or this a shot from the hip? known good bomb? sheet ! they can be tested easily.
  ----- Original Message ----- 
  From: Thatcher Hubbard 
  To: Andrew Carver 
  Cc: urq at audifans.com 
  Sent: Monday, January 26, 2004 8:07 AM
  Subject: Re: [urq] brakes problem


     My car does this as well, and this just after I had all four calipers 
  and rotors replaced.  I know it's not the bomb, because I've swapped it 
  with a known good part and this still happens.  A friend of mine who is 
  a mechanic insists that that's just the way hydraulically boosted 
  brakes are, but I don't believe that to be true.  If it's a simple, as 
  Phil suggests, as a brake bleed, I'd be really happy.  I've been 
  reading messages on the lack of availability of the brake servo and 
  getting nervous.

  On Jan 25, 2004, at 1:55 AM, Andrew Carver wrote:

  > Strange issue here but this will be a lay up for the vets here.
  >
  > My brakes seem to work fine for normal around town driving.  However, 
  > when I hit the brakes suddenly (meaning I apply brake pressure hard 
  > quickly) there is brake stiffness and it takes about 0.75 seconds for 
  > the brakes to start working.   It's like there is a delay and then 
  > only after the delay does the brake pedal depress and start operating 
  > the calipers.   Then after the 0.75 seconds they seem to work normally 
  > except that I can bottom the brake peddle on the floor... which does 
  > not seem good.
  >
  > Bomb issue?
  >
  > Please help.
  >
  > Thanks,
  > Andy
  > corrado at stanford.edu
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