Hard pedal

[Chrishrvs]

When braking a bit sharply or firmly does anybody experience their brake pedal being hard like there's no vacuum in the system? I get it sometimes if I have to brake a bit suddenly like on the motorwayand there's suddenly a bit of traffic infront.

Wondered if it was a characteristic of the vehicle or there's a common theme and I need a new vac pump. No hissing noise if I hold my foot on the brake pedal.

Thanks in advance.

[TMB]

It's happened to mine once or twice, scared the life out of me! No idea what caused it though as couldn't find anything wrong.

[sepulchrave]

Possibly the vacuum non-return valve is sticking open.

[TMB]

22 minutes ago, sepulchrave said:

Possibly the vacuum non-return valve is sticking open.

 

Ah, thanks. Will look at that.

[TMB]

Have ordered a new servo pipe which comes with non-return valve. It's a bloody dangerous fault when it occurs. I nearly rear-ended a car last time but the servo kicked in right at the last minute causing me to come to a violent stop.

[TMB]

Hmmm, skodaparts.com gave me the wrong part number, which I went and ordered at another skoda dealer on ebay because they were cheaper. They gave me 6Q2612041AL when the correct one is 6Q2612041E

 

EDIT: It's all sorted now. They are changing the order and sending me the right one.

 

 

Edited 20 May, 2017 by TMB

[Chrishrvs]

Can you let me know how you get on please

[stevobeavo]

I used to have it when I used to run EBC yellowstuff stuff. Braking hard from motorway speed they sometimes, very rarely though made the pedal go really hard and have no stopping ability, even when having 2 feet pushing as hard as I could. 

 

Swapped to brembo pads and have never had this problem since. 

 

Worth a thought. 

[TMB]

13 hours ago, Chrishrvs said:

Can you let me know how you get on please

 

Of course, but since it only does it once in a blue moon you might be waiting a while

[Chrishrvs]

Thanks, I'll tread gently untill then 

Edited 21 May, 2017 by Chrishrvs

[Chrishrvs]

7 hours ago, stevobeavo said:

I used to have it when I used to run EBC yellowstuff stuff. Braking hard from motorway speed they sometimes, very rarely though made the pedal go really hard and have no stopping ability, even when having 2 feet pushing as hard as I could. 

 

Swapped to brembo pads and have never had this problem since. 

 

Worth a thought. 

 

Before I started driving mine I put pads and discs on, I wonder hmmmmm.

[KenONeill]

@Chrishrvs @stevobeavo ER, EBC yellowstuff is a track day compound isn't it; not biting from cold is to be expected if so.

[stevobeavo]

42 minutes ago, KenONeill said:

@Chrishrvs @stevobeavo ER, EBC yellowstuff is a track day compound isn't it; not biting from cold is to be expected if so.

They work at normal operating temperature too. They braked fine when it want -7 first thing in the morning. 

[TMB]

Nice new pipe. Too bloody hot outside to fit it yet though

 

Edited 25 May, 2017 by TMB

[Chrishrvs]

On 25/05/2017 at 12:29, TMB said:

Nice new pipe. Too bloody hot outside to fit it yet though

 

Hey there, how have you found your brakes to be since fitting the new pipe? 

Any more  moments?

[TMB]

50 minutes ago, Chrishrvs said:

Hey there, how have you found your brakes to be since fitting the new pipe? 

Any more  moments?

 

 

It has not missed a beat so far

[Ams1970]

My 2004 skoda fabia 1.9 tdi did this last night was ready to bail out  I pulled over and they came back on so is it the pipe I cannot see much under the bonnet and have no mechanical knowledge so don't know what to look for 

[TMB]

It could be the pipe yes. They can develop splits in the plastic, or the non-return valve might be playing up. Mine has never done it again since replacing the pipe. The other possibility is a faulty vacuum pump on a diesel, or even the servo itself. however I would think this more unlikely.

[Ams1970]

Thanks for your help.was wondering though if it was a pipe would it not be doing it all the time brakes seem fine today 

[TMB]

1 minute ago, Ams1970 said:

Thanks for your help.was wondering though if it was a pipe would it not be doing it all the time brakes seem fine today 

 

Well if it's the non-return valve which is all part of the pipe it could be failing intermittently. Also cracked pipes can sometimes cause intermittent failure

[Ams1970]

Ok think it's off to garage to get checked out thanks again

[TMB]

No probs.

[TMB]

If you have a look at this VW Golf video you can see how the pipes can split...

 

 

[Ams1970]

Thanks for the video I was looking at the other side do you know if it will be on the same side as video on the fabia looks easy enough to replace if I can find it lol 

[TMB]

Same side as in the video I think.