brake pedal pulsing???

[kstation]

noticed in the last couple of day when braking i get a weird plusing from the brake pedal only seems to happen when i'm goin slow, like when crawling to a junction. anyone know what could cause this?

cheers kev

[Wayne]

Warpped disc or abs cutting in too early.

[kstation]

yeah cheers mate just done a search ooops SORRY DUDES should of done that first looks like its my abs gonna have a look at my brakes at the weekend give them a good clean and free them up a bit 

[thai-wronghorse]

noticed in the last couple of day when braking i get a weird plusing from the brake pedal only seems to happen when i'm goin slow, like when crawling to a junction. anyone know what could cause this?

cheers kev

Snap! Mine has just started doing this to and become even more prominent on my journey home from work this evening. I also noticed that there seems to be a grinding noise coming from the n/s/r brake. Like you've just mentioned Wayne, it seems as if the ABS is now cutting in too early, why would this happen all of a sudden other than a warped disc?

[Stirring Moose]

I had this a little while back. My ABS light would come on randomly but, while the system was technically working (light off), the ABS was cutting in far too early, especially at low speeds. A dodgy sensor was eventually found but I've had that before and that normally just kills the system until it's fixed. On this occasion though, it was also found that the brake pads were well past their prime (in fact they were utterly shagged, really should've spotted it earlier  :embarassed:) Now it may be coincidence and I'm not sure if it's technically possible for excessive pad wear to baffle the ABS but it might be something to check.

S.M. 

[thai-wronghorse]

I haven't had any issues with the warning light coming on and it definitely works as it was changing last month when i fitted the 2 new front ABS sensors. Excessive pad wear would kinda add up in my case though as like i say, ive just acquired a rather lovely grinding noise.

[kstation]

so do you reckon its the abs sensor then? i when i done a search the thread i found said its usually caused by a seized/stiff caliper

[davies1644]

could be but more than likely a warped disk thats what iv had before tbh a seized caliper would make the car pull to one side as apposed to giving a juddering feeling

[kstation]

Would I not feel chatter thru the steering wheel if it was a warped disk tho? Also if it was an ABS sensor would the abs light flash on

[AudiA8Quattro]

ABS is a distinct feeling.
On my old car, a rear shock was totally shot, that was enough to make the ABS kick in early