[xj40] Brakes, need help please

My '93 started having a weird indication a few days ago
where the brakes would intermittantly throw a brake warning
light the instant I pushed the brake pedal, then the pedal
has a physical ‘thump’ sensation (presumably the ABS pump
kicking in because it does coincide with the sound of the
teives pump motor), and the brake light would go out.

It was almost like the pedal moved before pressure build up
was sensed and the system was kicking in, but as I pressed
the pedal further the car would stop normally and the brake
light would go out. If I hit a spot of water with heavy
braking, the ABS does in fact work as designed.

This was a little unnerving to me. I decided to replace the
pads to get all the pedal back and bleed the system, only
did the fronts as no one has rear pads locally available.
The front pads were worn to the point the driver side sensor
wire was touching the rotor, so it was time anyway.

Now, I was pulling into work this morning and the pedal felt
a little light and had excessive travel…almost to the
floor. No fluid was lost from the system, so an external
leak has been ruled out. It’s almost as if the pedal is
fading, which indicated a bad master cylinder to a normal
brake system…but I figured I’d run it by you here first,
the master cylinder looks prettyt expensive to guess on.

Thanks
Bill Hunter–
BBA
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In reply to a message from BBA XJ6 sent Tue 7 Sep 2004:

Fixed.

It was the grenade (accumulator).–
The original message included these comments:

My '93 started having a weird indication a few days ago
where the brakes would intermittantly throw a brake warning
light the instant I pushed the brake pedal, then the pedal
has a physical ‘thump’ sensation (presumably the ABS pump
kicking in because it does coincide with the sound of the
teives pump motor), and the brake light would go out.


BBA
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !