abs brakes

[wizzy]

hi i have got a 2.0ltr redtop corsa with abs but it seems not to be working i have bleeded them they got harder but as soon as the car was started the pedal goes straight to the floor and the brakes dont work any idea what this could be cheers :thumb:

[Jay]

Nothing to do with your abs, maybe a knackered servo.

[Jay]

Saying that, you can run a car without a servo, so thats not true.

[wizzy]

oh yes cheers mate ill get a new one

[wizzy]

Saying that, you can run a car without a servo, so thats not true.

ok anythink else it could be??

[Jay]

Sure you bled them correctly, checked all the hoses for leaks etc, made sure all bleed nipples are done up...

[Sloth]

iirc the corsa abs needs bleeding with tech 2....

[Gibbo]

iirc the corsa abs needs bleeding with tech 2....

whats that

[Pistol Pete]

Diagnostic program. You can buy code readers off eBay that plug into your laptop.

[General Baxter]

if you pump the pedal does the pressure come back?

would be blown seals in the MC :(

[Riggy]

have you got the vac hose fitted correctly ?

[wizzy]

have you got the vac hose fitted correctly ?

whats that

[brainsnova]

the hose that goes to the brake servo.

[brainsnova]

i bleed my calibra abs brakes with the engine running.

[Jack]

have you got the vac hose fitted correctly ?
I thought that makes it harder? I'm sure my vac hose had a leak, and that was causing my pedal to be stiff

[wizzy]

i bleed my calibra abs brakes with the engine running.

i thought i would have to do that but the pedal is soft even without the engine running

[meritlover]

as soon as the car was started the pedal goes straight to the floor

servo appears to be working.

have the brakes ever worked or is this a new instal?
could be the MC is too small or the seals are gone. as long as there are no leaks then its all it can be.

[wizzy]

have the brakes ever worked or is this a new instal?

i dont know i have only just bought it

could be the MC is too small

its the 1.6 gsi servo with 1.6 brakes

the seals are gone.

how do i check this

cheers

[wizzy]

will a servo off a nova fit??

[BODGSI]

have you checked your rear shoes and cylinders?
if the shoes aint adjusted you will have excessive pedal travel
and if a rear cylinder is leaking it will be soft!
a good check would be clamp off all brake hoses and check pedal then!

if your servo was playing up or you had a vac problem your pedal would go rock hard!! :thumb:

[wizzy]

have you checked your rear shoes and cylinders?
if the shoes aint adjusted you will have excessive pedal travel
and if a rear cylinder is leaking it will be soft!
a good check would be clamp off all brake hoses and check pedal then!

if your servo was playing up or you had a vac problem your pedal would go rock hard!! :thumb:

cheers mate i will try that :thumb:

[GRUNT 16V]

i would say that the master cylinder has gone !! the pedal falling to the floor slowly is tell tale diagnosis for it .

[Gibbo]

pedal not falling. when u pump it and hold the pedal down it stays hard but when you let it off and put it back on its soft agen