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 Post subject: Spongey brakes
PostPosted: Sun Jun 04, 2017 3:28 pm 
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Joined: Sat Dec 07, 2013 11:10 am
Posts: 13
Hi all ive got a 1.3 a reg mk2 fiesta, ive fitted xr2 front calipers and discs and pads, ive also fitted new goodridge braided brake lines however i have a spongey pedal. Goes really far down before working but feels good at bottom. Ive pressure bled
The system numerous times but its no better? Any tips cheers


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 Post subject: Re: Spongey brakes
PostPosted: Sun Jun 04, 2017 9:20 pm 
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Joined: Fri May 23, 2003 11:04 pm
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Location: Manchester
Are the calipers in good condition?
No leaks anywhere?

My 1.1 on xr2 front brakes was good.
But locked on heavy breaking.

Jason.

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 Post subject: Re: Spongey brakes
PostPosted: Sun Jun 04, 2017 9:46 pm 
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No leaks that i can see, pedal just does nothing till near the floor, was thinking master cylinder?


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 Post subject: Re: Spongey brakes
PostPosted: Mon Jun 05, 2017 9:42 am 
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Joined: Fri May 23, 2003 9:15 pm
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If you pump the brake pedal - does the pedal get stiffer and the bite point higher? Or does it stay right on the floor?

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 Post subject: Re: Spongey brakes
PostPosted: Thu Jun 08, 2017 7:39 pm 
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Try manualy bleeding i found pressure worked a little but manualy made it better also make sure rear shoes are adjusted propperly

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 Post subject: Re: Spongey brakes
PostPosted: Wed Jun 14, 2017 11:13 am 
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Joined: Mon Aug 10, 2009 1:34 pm
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Location: Colchester
Bomber wrote:
If you pump the brake pedal - does the pedal get stiffer and the bite point higher? Or does it stay right on the floor?


I have fitted XR2 brakes too, with a mondeo mastercylinder. Sitting stationary with engine turned off pumping the pedal does make the pedal get stiffer...What would be the issue...Sorry to hijack but this wasn't responded to or answered :D


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 Post subject: Re: Spongey brakes
PostPosted: Fri Jun 16, 2017 8:03 am 
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With the engine off suggests there is air in the lines.

With a Mondeo cylinder/servo, you need to make sure your pushrod and bracket to bulkhead angles are all ok - otherwise you will get weirdness in the feel.

Pop a post up and someone should reply!

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 Post subject: Re: Spongey brakes
PostPosted: Fri Jun 16, 2017 8:50 am 
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Joined: Mon Aug 10, 2009 1:34 pm
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Location: Colchester
Bomber wrote:
With the engine off suggests there is air in the lines.

With a Mondeo cylinder/servo, you need to make sure your pushrod and bracket to bulkhead angles are all ok - otherwise you will get weirdness in the feel.

Pop a post up and someone should reply!


Mine is literally just bolted on...I have seen over the last few days people adding a nut on the bottom studs to space it out adjusting the angle, so I may give that a bash at the weekend and rebleed them. The brakes do engage just at the bottom of the pedal travel which isnt ideal i must say!


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 Post subject: Re: Spongey brakes
PostPosted: Fri Jun 16, 2017 9:16 pm 
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You do need to re-angle the servo and shorten the pushrod - i think.

Someone on here will know for sure.

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 Post subject: Re: Spongey brakes
PostPosted: Thu Jun 29, 2017 9:31 pm 
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Location: Banbury/Norfolk
I had this exact problem when I got my mk2, I reconditioned the front brakes, new seals, pads, discs, braided lines the lot. Made no difference, so I redid all the rear, new everything, still no difference, 100% sure they were bled properly.
Then I was randomly checking my brake lights with a bar on the brake pedal while the whole car was up on stands and I noticed the rear wheels weren't locked, not even tight.
So I guessed it had to be the pressure reducing valves, so I made up some small new pipes to bypass the valves and get rid of them completely, bled them up and the pedal has been perfect ever since!
So I'd give that a go, some people say the rears will lock really easily without the valves but I've not had any problems but I've not done any full blown emergency stops but under normal heavy braking it's been fine, the car is stripped out as well so even less weight in the back!

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