The first time that I press the brake pedal - it depresses
further than it should. When I hit the brake immediately
afterwards - the brakes work fine. I bled the brakes and
that did not help. Any ideas?–
SCL
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In reply to a message from SCL sent Tue 27 Mar 2012:
Probably the master cylinder, these will normally pump up if the
leak is only slight.–
850225/679,1E21003,2W2001BW,JNAEY3AC100218,SAJNV4841KC156072
HEIDELBERG HEIGHTS, Australia
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In reply to a message from SCL sent Tue 27 Mar 2012:
If you have warped rotors, or a bit too much run out on your front
wheel bearings, as you drive the wobble will send the pistons and
pads into the calipers, and so the first time you hit the pedal, it
has to make up that distance…
David
Atlanta 1994 XJS 6.0L–
Penfold99
Atlanta, GA, United States
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In reply to a message from Norman LUTZ sent Tue 27 Mar 2012:
Thanks - any possibility it could be the booster?–
SCL
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In reply to a message from Penfold99 sent Wed 28 Mar 2012:
If the rotors were warped - I would probably feel a pulsing. an
you explain a little further about the wheel bearing?–
SCL
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If the rotors were warped - I would probably feel a pulsing.
Not necessarily. If the THICKNESS of the rotor varies, you get a
pulsing. If the rotor is merely warped but remains the same
thickness all around, you might not actually feel it – but it’d back
the pads up for sure.
an you
explain a little further about the wheel bearing?
Same effect as the warped rotor, actually. If the wheel bearings are
loose, the rotor wobbles, backing up the pads. Easy to fix, just
adjust the wheel bearings. If that’s your problem, you should see an
immediate improvement.
– Kirbert
// please trim quoted text to context onlyOn 28 Mar 2012 at 13:21, SCL wrote:
In reply to a message from SCL sent Tue 27 Mar 2012:
Isn’t bleeding of an ABS equipped car somewhat different
compared to an older car? The '95 uses an X300 style
brake/ABS system. Did you check their archive for a solution?
good luck,–
Arnoud, XJ6C 4.0, XJS Convt. 4.0 S/C 5-sp
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In reply to a message from Arnoud sent Thu 29 Mar 2012:
I chased this for along time on a Volvo I own, first
application very long pedal travel and one immediately
afterwards nice and firm.
In my case, it turned out to be a caliper sticking on it’s
slide pins, so perhaps one of the pistons on your calipers
is stuck.–
86 Supra, XJS mega project
Canberra, Australia
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In reply to a message from Arnoud sent Thu 29 Mar 2012:
On my 1994 it has the Teves III ABS system with the
accumulator ball under the bonnet; it does indeed have a
different bleed technique for the rear brakes. I believe,
and only about half sure, that the '95 has the Teves IV ABS
system that doesn’t require the same technique and you can
bleed normally. Easy way to check is to look under the
bonnet to see if there is a black sphere near the firewall on
the right side.–
The original message included these comments:
Isn’t bleeding of an ABS equipped car somewhat different
compared to an older car? The '95 uses an X300 style
brake/ABS system. Did you check their archive for a solution?
–
94 XJS 4.0L 2+2 Convertible
KS, United States
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In reply to a message from TexChappy sent Sat 31 Mar 2012:
My 95 has a Teves III. Some 95’s have the IV, and all 96’s
have IV–
95 AJ16 http://www.jag-lovers.org/v.htm?1325653847 Houston
Houston, TX, United States
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