Honda Car Forum

Brake pedal sinks partially when applied going down a hill at slow
speed. A pump or two will bring it back up. This has been going on for
a few weeks. No noticible loss of fluid in brake reservoir. Could a
faulty booster cause this?

Car is 94 Accord wagon w/ABS brakes.

Phil

On Wed, 17 May 2006 16:55:18 -0700, Philip Trenholme <dim1@comcast.net> wrote:



>Brake pedal sinks partially when applied going down a hill at slow
>speed. A pump or two will bring it back up. This has been going on for
>a few weeks. No noticible loss of fluid in brake reservoir. Could a
>faulty booster cause this?

>Car is 94 Accord wagon w/ABS brakes.

you have air in the line

take it to a qualified mechanic to bleed the system.
Or read a book.

Philip Trenholme <dim1@comcast.net> wrote in
news:rudn62lcslptsp1l40hj5esaf9uu3d8a9f@4ax.com:

>
> Brake pedal sinks partially when applied going down a hill at slow
> speed. A pump or two will bring it back up. This has been going on for
> a few weeks. No noticible loss of fluid in brake reservoir. Could a
> faulty booster cause this?


A faulty booster will cause a hard pedal. See AZ Nomad's post.



--
TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

Philip Trenholme wrote:
> Brake pedal sinks partially when applied going down a hill at slow
> speed. A pump or two will bring it back up. This has been going on for
> a few weeks. No noticible loss of fluid in brake reservoir. Could a
> faulty booster cause this?
>
> Car is 94 Accord wagon w/ABS brakes.
>
> Phil

bad master cylinder. if the seal is worn, at low pressure, fluid can
leak around the seal. at high pressure or when pumped, it temporarily
seals and feels hard again. replace seals or cylinder, depending on
parts availability for that model. booster either works or not. if
not, the brake is so hard, you'll think you're going to break the pedal
off trying to stop the car.