Brake pedal needs pumping...!

[danielc16]

hello i done a search but nuffink!! right to the point i got a ibiza 2001 cupra R and the problem is:

The brake goes soft when i brake but when i pump it up and it goes hard and it brakes like normal after going down the road it does the same thing?

but when im parked up i done the pump the pedel while engine is off and it goes hard, then i keep my foot down on the pedel and turn the engine on and it goes down a little bit like any other car! and the thing is the brake stays good for ages but as soon as the cars driven it goes soft and you got to pump it up?

would i need to bleed the brakes?
m/c failed??

if any would could help me it would be a great help cheers dan

 

[DPJ]

Your brakes need bleeding - and a check to see if they are losing fluid.

If bleeding doesn't resolve, you have another fault.

*Needs power bleeding, not manual.

 

[danielc16]

hi , dave i checked the fluid level and its fine. i dont fink i go any leaks as i check my wheels and brakes and no signs

and what do you mean by Needs power bleeding, not manual. cheers

 

[andycupra]

he means when bleeding use a system thats forces the brake fluid through, is a pressure system and not by pressing the brake peddal.

check over all the pipes to do with the brakes. - in particular check the state of the vacum pipe for the master cylinder.

 

[Importcupra]

sounds like servo to me, check for leaks from vacume pipes to the servo

 

[danielc16]

well i been to the seat garage and they said my nsr cailper is leaking and you need a new one and its to dangerous to drive and they told me £350 to fix i was like wtf!! so i sed no thats not right as i cant see no leaks?

 

[ibizacupra]

if you have engine off, and pump the pedal it goes hard yea? if you keep pressure on the pedal does it sink slowly?

master cylinder seal likely unless there is a physical leak

 

[danielc16]

ibizacupra the pedel goes hard! and if i keep pressure on the pedal it dose sink a little bit but then stops and it holds it pressure and doesnt go down any more?

 

[ibizacupra]

but when driving they feel or go soft but pump up yea?
pressure bleed your brakes first I would suggest.

 

[danielc16]

ibizacupra i have pressure bleed the brakes so it wasnt that so i think my m/c gone do u know how hard it is to change one? cheers

 

[ibizacupra]

its awkward access but not technically hard.
pressure bleed again... they can be a 'mare sometimes.

worth a go vs the effort to change the m/c

 

[SEATCOOBER]

i think whats happened here has the previous owner been messing with the brakes as this sounds like the problem i have, i took both rear calipers off to refirb them, put a glove over the resevoir so it would cause a vacuum and the fluid would not leak out, but over night when the calipers were drying the glove split letting all the fluid leak out letting air into the system and into the abs system, now ive run the pump for ten seconds on vag com and bled the brakes till no air is in the system but still have the symtoms you describe, apparently the abs is a pain to bleed, im seriously thinkin to give it to a garage soon!!! quick question does the cupra have abs on the rear aswell?

 

[danielc16]

i think whats happened here has the previous owner been messing with the brakes as this sounds like the problem i have, i took both rear calipers off to refirb them, put a glove over the resevoir so it would cause a vacuum and the fluid would not leak out, but over night when the calipers were drying the glove split letting all the fluid leak out letting air into the system and into the abs system, now ive run the pump for ten seconds on vag com and bled the brakes till no air is in the system but still have the symtoms you describe, apparently the abs is a pain to bleed, im seriously thinkin to give it to a garage soon!!! quick question does the cupra have abs on the rear aswell?

Yea i mite garage it too and yea it does have abs on the at the back as their it abs sensors on the hub on the back

 

[SEATCOOBER]

have you solved this problem yet danielc16?? mine is booked in to garage for pressure bleed on friday whats a good price for one?

 

[danielc16]

have you solved this problem yet danielc16?? mine is booked in to garage for pressure bleed on friday whats a good price for one?

Hi SEATCOOBER no i havent but i had it pressure bleed and its still got the same problem so its the m/c thats gone. so ive drained all the fluided and getting my brembos repainted and new brake pads all round with braided hoses all round. so when thats all done i will change the m/c and get it pressure bleed...


let me know how yours goes hopfuly it will be good soon!!

 

[SEATCOOBER]

have you tried running abs pump and then bleed the brakes with engine running? this is what im going to do before i give it to garage?

 

[jivejester]

abs bleed using vagcom... problem solved.

Procedure for Bleeding the ABS Brake Pump on VW Golf, GTI, Jetta, and Audi TT:
[Select]
[03 - ABS Brakes]
[Basic Settings - 04]
Group 001
[Go!]
This will trigger the ABS pump to turn on for about 10 seconds. You should hear the fairly loud pump clicking during this time.
Click the [Done, Go Back] button and you're all set.

 

[andycupra]

abs bleed using vagcom... problem solved.

Procedure for Bleeding the ABS Brake Pump on VW Golf, GTI, Jetta, and Audi TT:
[Select]
[03 - ABS Brakes]
[Basic Settings - 04]
Group 001
[Go!]
This will trigger the ABS pump to turn on for about 10 seconds. You should hear the fairly loud pump clicking during this time.
Click the [Done, Go Back] button and you're all set.

is that it?
do you do this after, before or during a general bleed?
do you need any nipples open when you do this?

 

[jivejester]

In the past i've pressure bled the system and then run through the vagcom abs bleed procedure. Beware though, you will need 2L of brake fluid and a spare pair of hands.

 

[andycupra]

In the past i've pressure bled the system and then run through the vagcom abs bleed procedure. Beware though, you will need 2L of brake fluid and a spare pair of hands.

so if you are using 2 litres of brake fluid, where are you taking the fluid from?

canyou do a short run through of how?