Brake Pedal Drop and Grinding
#1
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I have a 2002 X type 3.0 with 72,000 trouble free miles but for the last couple of years there will be times when the brake pedal will incrementally drop while braking and then make a grinding noise while stopping. The car has been looked at a couple of times at the Jag dealer and they could not find anything wrong with the break system. The car always stops fine and the pedal never goes to the floor but if you feel it dropping if you lift off the brake and then press again it will work normal. This only happens occassionally...the car does have Akebono ceramic break pads...this is the only changed from production. Any similar issues or suggestions?
#3
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#6
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There is a round thing attached to the drivers side firewall, by the brake reservour. right behind the radiator reservour. That is the vacuum brake booster, there are vacuum lines coming off it. It is probably the most common area for a vacuum leak.
#7
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I have been listening closely and when it makes this noise...after you take off within a few seconds you will hear and feel something that sounds like a "release". This leads me to believe you are on the correct track of a caliper issue. It may not be closing correctly as it is applying the brake and then releasing later...it is not as if it is frozen or stuck on the close position because I would feel the resistance when i take off.
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#8
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Did you ever get to the root of this problem? I have a 2004 XJ which is doing similar things occasionally. There seems to be a slight give in the brake pedal and a mild "grinding" sensation working its way back up through the brake pedal. The DSC and ABS lights then come on but the brakes still work fine. The DSC light then goes out of its own accord. When I next start the car next day, the ABS light is still usually present but goes out soon after I start driving. Probably happens one in every five times I drive the car.
#9
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@Flingel 11 year old thread AND this is the X Type Forum (X400), probably best if you go to the correct forum to ask/search
https://www.jaguarforums.com/forum/x...-x350-x358-28/
https://www.jaguarforums.com/forum/x...-x350-x358-28/
Last edited by Dell Gailey; 09-21-2022 at 02:28 PM.
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steve_schmidt
XJ6 & XJ12 Series I, II & III
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