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What is Correct Pedal Travel for '92 Buick Regal, ABS VI brakes?

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JoeSch

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Aug 18, 2007, 3:36:00 PM8/18/07
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I have a '92 buick Regal, 3.1 six with Delco ABS VI brakes. I got the
car a year ago. I just noticed the driver's rear does not have any
brake pads on it. But the brakes were okay before the brake line to
the rear passenger's side rusted through and I had to put in a new
one.

During that procedure, I got bad advice and drained the brake master
cylinder reservoir to 10% of it's capacity. As a result, I had air in
the system. I gravity bled it, which helped some, but when I turned
on the car the brake pedal travel was excessive.

I bled each of the brakes with a 5 dollar NAPA kit, the old pump-the-
pedal way, and the situation is now as follows:

A) when I touch the pedal when the car is turned off, the brake pedal
gets hard about 10% of the way down.

B) When I turn the car on, the brake pedal gets hard about 50% to 60%
of the way down.

Is this acceptable?

aarcuda69062

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Aug 18, 2007, 8:42:15 PM8/18/07
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In article
<1187465760.7...@g4g2000hsf.googlegroups.com>,
JoeSch <joesc...@lycos.com> wrote:

With the engine running and your right foot on the brake pedal
like you're making a normal stop, is the brake pedal lower than
the gas pedal, even with it or higher?

jim

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Aug 18, 2007, 9:27:59 PM8/18/07
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Sounds about right. The real test is will it make a panic stop
effectively at highway speeds. Adjusting the rear brakes might bring the
pedal up some more. You also should be aware that if one line burst
others may be ready to go soon .

-jim


> Is this acceptable?

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Marsh Monster

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Aug 19, 2007, 12:18:53 PM8/19/07
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==========
==========

please define....."acceptable".


untill then.....
based on experience, No...this is not acceptable
as it relates to a properly functioning system on that
particuler application.

~:~
MarshMonster
~sips his mushroom tea.....grabs his dictionary........
mmmmm.........good stuff~
~:~

JoeSch

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Aug 21, 2007, 12:42:29 AM8/21/07
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The brake pedal in relation to the accelerator pedal goes like this:

When my foot is off the brake pedal, it is considerably higher than
the accelerator level.

When the car is moving and I go to brake, the brakes come on
gradually. When my brake pedal is about even with the accelerator
pedal heightwise, the brakes are working and in most cases, this is
enough to stop the car. I don't do a lot of sudden stops, on
principle.

However, as I slow down and my brake pedal is even with the
accelerator pedal, there is still an inch or two of travel if I want
to come down HARD to a stop. Like I said, for normal stops the brake
pedal will not have to go beyond the level of the accelerator pedal.

How does that sound?

On Aug 18, 8:42 pm, aarcuda69062 <nonel...@sbcglobal.net> wrote:
> In article
> <1187465760.716530.252...@g4g2000hsf.googlegroups.com>,

> the gas pedal, even with it or higher?- Hide quoted text -
>
> - Show quoted text -


JoeSch

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Aug 21, 2007, 10:07:18 PM8/21/07
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This board does not have an Edit feature that works once something is
posted, so allow me to amend the above message.

As I stated before, to stop the car normally I need only push down the
brake pedal to a point that it is slightly ABOVE the level of the
accelerator pedal. However, If I am slowing down the car with the
brake pedal just above the acelerator pedal, and I stamp down HARD,
the brake pedal will go to level just below the accelerator pedal-not
two inches, more like half an inch. I wrote two inches because you
get so sensitive to the touch that it seems longer than half an inch,
but it really isn't.

aarcuda69062

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Aug 22, 2007, 8:44:31 PM8/22/07
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In article
<1187748438....@q3g2000prf.googlegroups.com>,
JoeSch <joesc...@lycos.com> wrote:

> This board does not have an Edit feature that works once something is
> posted, so allow me to amend the above message.
>
> As I stated before, to stop the car normally I need only push down the
> brake pedal to a point that it is slightly ABOVE the level of the
> accelerator pedal.

Sounds normal.

> However, If I am slowing down the car with the
> brake pedal just above the acelerator pedal, and I stamp down HARD,
> the brake pedal will go to level just below the accelerator pedal-not
> two inches, more like half an inch. I wrote two inches because you
> get so sensitive to the touch that it seems longer than half an inch,
> but it really isn't.

If you push hard enough, you can actually bend the points where
the master cylinder/brake booster attach.

Being a Delco IV system, I'd be inclined to take the black
plastic cover off of the bottom of the ABS module and see if any
of the gears from the forcing motors have fallen off.

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