Technical vibration when braking not discs

[danielb]

My punto has developed a vibrating when I touch the brake pedal even if I only just touch the pedal but only while over 15mph. The noise/feeling continues after I let go of the pedal for a second.
It felt like it was coming from the front nearside so I checked the brakes on that side and everything seemed fine. Then I realised the ABS pump is on that side, if I remove the maxi fuse for the pump I get the handbrake light and abs light but brakes feel fine.

I tried bleeding the brakes to see if there was air in the pump but one of the rear bleed nipples have broken.
Any suggestions?

Thanks,
Dan

 

[s and b]

if disconnecting abs cures the problem then that is the problem
there arent relucter rings to break on these fine cars unlike cheese built clios so i suggest you do a scan to ascertain which wheel causing the problem
never had a problem here so cant advise with fes but a visual check of the abs pickups would be a good starter
plus in the drums sometimes these get broken due to ratchets dropping out due to poor maintainance

 

[Ziggy122]

A Broken Bleed nipple isn't good

Is it leaking fluid? If so - DO NOT put the ignition on with a draining system
it'll empty out a tiny space inside the pump that can not run dry

If no fuse and problem is going away - then as S+B Said its the abs pump kicking in when it shouldnt

If the problem remains
get the front disc's checked for been warped - or just replace them
I dont know how much a DTI test is, but new brakes are always nice (once bedded in)

The Rear drums are often mishappen as monkey mechanics try to smash the drums off with a hammer
BAD IDEA
It causes a drone + rumble as you brake

Ziggy

 

[danielb]

I did get an error light for the nearside rear abs sensor a few weeks ago while driving home but I cleared it and it came back a few times intermittently but then the error light stopped coming before I had chance to change it and its been fine since.
Actually its the same wheel with the broken bleed nipple. New cylinder and abs sensor a good place to start I think.
Thanks,
Dan