Brakes goes spongy when engine on

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Corsa X10XE
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Brakes goes spongy when engine on

Post by Corsa X10XE »

I have this problem with my Corsa. Its a T reg 1.4 with ABS. About a year ago or more I had changed one of the rear wheel cylinders and I think the brake linings were changed. After this the brakes were practically crap. Even though I bled it so man times with different methods, checked the one-way valve from the servo. I had even replace the master cylinder for a similar, but then realised one number was different. Got another with same numbers, but the ports were bigger. It made no difference. I even opened the original master cylinder to re-insert seals to make sure they were properly, but no cigar.
I have bled the car, using pressure bleeding, and manual. I think I had even bleed it once with the wheels off the ground as to the usual with it on the ground. I am left confused, has to be the most difficult car I have come across at bleeding. I can get the brakes solid by bleeding with the engine off, as soon as it is turned on and go for a drive, it just doesn't have the bite and creeps to the floor.
I was even looking at replacing the servo, but the ABS servo seems non existent for sale.

Has anyone come across this problem, any tips before I end up taking a sledge hammer to the car, lol.
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johnny
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Re: Brakes goes spongy when engine on

Post by johnny »

Did you bleed them with the car running?

Sent from my SM-G900F
If it doesn't fit,
force it,
If it breaks,
It needed replacing anyway :thumbs:
Corsa X10XE
CB-Uk Newbie
Posts: 13
Joined: Mon Nov 11, 2013 12:21 pm

Re: Brakes goes spongy when engine on

Post by Corsa X10XE »

Yeah I did this once, but it still didn't solve it sadly :(
johnny wrote:Did you bleed them with the car running?

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johnny
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Re: Brakes goes spongy when engine on

Post by johnny »

Are you starting at the back wheels, should do left rear right rear left front right front

Sent from my SM-G900F
If it doesn't fit,
force it,
If it breaks,
It needed replacing anyway :thumbs:
Corsa X10XE
CB-Uk Newbie
Posts: 13
Joined: Mon Nov 11, 2013 12:21 pm

Re: Brakes goes spongy when engine on

Post by Corsa X10XE »

johnny wrote:Are you starting at the back wheels, should do left rear right rear left front right front

Sent from my SM-G900F
Yes, I followed it in this exact order.
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stanc3w0rks
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Re: Brakes goes spongy when engine on

Post by stanc3w0rks »

Are you losing brake fluid?

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