GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: 16vmk3ash on 10 October 2005, 01:15
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Hi i have been having intermitent problems with my brakes since i had 3 new ABS sensors fitted about 10mth ago and i nead to sort it before my MOT runs out.
Some times when i press the brake pedal i get little movement in the pedal then it corrects itself and the pedal travels as normal. The feedback feel is kind of mechanical as if there is a pressure build up and there is also quite a loud noise (sort of grinding sound)!
Does anyone have any idea what the problem is? ABS pump, ABS ECU etc
Thanks
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Check the brake servo for leaks.
What happens if you pump the pedal when the car is stationary?(with the engine on)
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Changing the ABS sensors would NOT have any effect on the performance or feel of the brakes in normal use. They only detect rotation of the wheel/driveshaft.
As 6 says and also try changing the brake fluid. Drain and flush it thoroughly, then refill with a good grade of new fluid.
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Another thought - check that the calipers are moving freely.
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If i pump the brake pedal with the engine on it acts as it would normally!, when this problem occurs though i have to pump the pedal a couple of times or keep my foot down for the problem to correct itself.
You say drain and flush the brake fluid throughly! would i do this the same way as a car without ABS or is there different procedures?
This noise i am hearing sounds like its coming from the handbrake area, which is where the brake lines for the rear run as well i think.
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I had something similar when I had a leaking rear cylinder...
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Then I think vr6 was right, sounds like a servo problem.
Havent done a Golf but changed the fluid on my 405 Mi16 and had no problems. Just watch that initial spurt of fluid - best to undo a bleed valve first. It is supposed to be recharged, but all I did was do a hard breaking until the ABS clicked in and had no probs since!