97 Eldo - brake firmness question
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 97 Eldo - brake firmness question in Past Cadillac Vehicle Discussion; I recently got to drive a brand new CTS for a day, and noticed that the brakes were very firm, ...
  1. #1
    Bob Ross is offline Cadillac Owners Fanatic
    Automobile(s): '97 Eldorado
    Join Date
    Feb 2011
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    97 Eldo - brake firmness question

    I recently got to drive a brand new CTS for a day, and noticed that the brakes were very firm, and I only had to depress the brake pedal slightly in order to notice this. One I got back in my Eldo, I noticed that the brakes performed differently (different cars, I know) so I'm not sure if they are working correctly or not.

    Here's how they are currently performing:

    1) When I depress the brake pedal for the first inch or so, there is very little resistance. However, the brakes do engage and the car comes to a slow stop, like for when I'm slowing down to a stop for a stop light up ahead. This is all I ever do for 99% of my braking.

    2) If I depress the brake pedal even further, it firms up quite a bit, and the car will come to a quick stop, but no skidding or ABS.

    3) If I depress the pedal even further (as in, close to the floor) the pedal becomes VERY firm and this causes hard braking enough for the tires to skid until the ABS kicks in.

    My main concern is with #1, and the lack of much pedal resistance in this range. Is that by design or should they be much firmer?

    Brake system history:
    -My front pads and rotors were replaced 26 months / 28k miles ago.
    -My rear pads, rotors and brake fluid were replaced 12 months / 12k miles ago.
    -About three months ago, I had my car in at a Firestone for an oil change, and they checked my brake fluid and said it was at 200ppm copper which indicated that replacement was needed. However, they had just replaced the fluid nine months before that and were lying to me on a bunch of other stuff so I figured they were probably BSing me on that too.

    So what do you think? Should I get my brakes checked or do they sound like they're ok?

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  3. #2
    basscatt's Avatar
    basscatt is online now Cadillac Owners 10000+ Posts
    Automobile(s): 89 Coupe DeVille, 95 Sedan DeVille, 03 SLS, two 02 DHS's
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    Re: 97 Eldo - brake firmness question

    Quote Originally Posted by Bob Ross View Post
    I recently got to drive a brand new CTS for a day, and noticed that the brakes were very firm, and I only had to depress the brake pedal slightly in order to notice this. One I got back in my Eldo, I noticed that the brakes performed differently (different cars, I know) so I'm not sure if they are working correctly or not.

    Here's how they are currently performing:

    1) When I depress the brake pedal for the first inch or so, there is very little resistance. However, the brakes do engage and the car comes to a slow stop, like for when I'm slowing down to a stop for a stop light up ahead. This is all I ever do for 99% of my braking.

    2) If I depress the brake pedal even further, it firms up quite a bit, and the car will come to a quick stop, but no skidding or ABS.

    3) If I depress the pedal even further (as in, close to the floor) the pedal becomes VERY firm and this causes hard braking enough for the tires to skid until the ABS kicks in.

    My main concern is with #1, and the lack of much pedal resistance in this range. Is that by design or should they be much firmer?

    Brake system history:
    -My front pads and rotors were replaced 26 months / 28k miles ago.
    -My rear pads, rotors and brake fluid were replaced 12 months / 12k miles ago.
    -About three months ago, I had my car in at a Firestone for an oil change, and they checked my brake fluid and said it was at 200ppm copper which indicated that replacement was needed. However, they had just replaced the fluid nine months before that and were lying to me on a bunch of other stuff so I figured they were probably BSing me on that too.

    So what do you think? Should I get my brakes checked or do they sound like they're ok?
    -------------------------
    If I depress the pedal even further (as in, close to the floor)
    if your brake pedal goes anywhere close to the floor -
    something is wrong -

    either air in the system - or rear brakes badly out of adjustment -
    would be my first two guesses -

  4. #3
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
    Join Date
    Feb 2009
    Location
    Jacksonville, FL
    Posts
    1,016

    Re: 97 Eldo - brake firmness question

    ^^^Agreed.

    the fact you have to depress them more than an inch to get anywhere is of definite concern but can stem from just about anything from bad master cylinder, leaking proportional valve, to maladjusted brakes and/or low fluid.

    A variety of tests can be done to determine what and where, but is dependent on know-how and tools...

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