VR6 Spongy Brake Pedal and ABS Light

[LukeManic 0]

Hi all,

 

I know there are a lot of threads relating to the 'spongy pedal' issue, but I've tried my best to sort my issue out from these threads and have hit a wall. Here is my problem:

 

- RHD Corrado VR6 (Teves 04) failed mot due to a bulging, front brake hose

- Took car home and found the unions were corroded onto the brake hoses, so was forced to cut the hard lines and refit new ones (common problem on old cars)

- This meant exposing the ABS module to air while replacing the lines (correct?)

- I have replaced hard lines and hoses and refurbed the calipers and filled the system with new fluid and bled with an eezibleed kit

- all calipers show clean fluid when bled, as does the ABS unit (two bleed nipples on top) and lastly the master cylinder, also checked for any leaks and there are none

 

I've done all of the above twice now and the pedal is still spongy and under braking the ABS light comes on straight away, when starting the car the light goes out as expected and stays out until the pedal is firmly pressed which suggests to me that there is air in the system?

 

Does this need to be bled in a different way from the eezibleed kit?

 

Any advice/experiences would be greatly received!

 

Cheers,

 

Luke.

[Pat_McCrotch 0]

Did you manually bleed the ABS pump and master cylinder? And if so did you have the ignition on?

[StueyB 0]

Can I ask why the ignition being on is important..?

[Pat_McCrotch 0]

It opens up the valves in the ABS pump.

 

I too had awful pedal after caliper and metal brake pipe replacement. I bled the ABS pump manually (ignition on) which improved feel by about 20% Then did the master cylinder with ignition on the next day. Felt amazing after that so must've been a massive air lock in the servo.

 

Not sure why you would have the ABS light on though so that may point to a bigger problem.

[beastie4126 0]

Do you not have to bleed the brakes in a particular order as I have on my A3 before. Bentley manual suggests pumping pedal 20 times and then seems to steer you towards right front, left front and then either rear?

[RW1 0]

@Luke

Wouldn't it be wise to have VCDS hooked up and find out exactly why the ABS light is on? Clutching at straws a bit really otherwise.

 

It opens up the valves in the ABS pump.........

When you do this, does it pump out brake fluid or did just rise and seep out of the bleed nipples?

 

.

[mimjed 0]

You should indeed follow the bentley manual for the bleeding order.

 

Try the extra bleeding with ignition on as mentioned. Back to the drawing board if not, mine was master cylinder in the end.

[LukeManic 0]

Thanks for the replies guys - been manic in work, going to retry suggestions this weekend. Will report back! :)