Back at u20 next week to replace the brake booster valve. All day job as it is a bitch to get at.
That sorted the car will be perfect again.
Loss of brakes
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steve2003rs6
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Re: Loss of brakes
Update.
Unit 20 advised that they don’t think the brake booster valve is the cause of the problem.
Re bled the brakes and also found a vac pipe was loose.
See how it goes.
They also fitted new track rods. Old ones were seized and we could not adjust the tracking after all new shocks fitted.
Unit 20 advised that they don’t think the brake booster valve is the cause of the problem.
Re bled the brakes and also found a vac pipe was loose.
See how it goes.
They also fitted new track rods. Old ones were seized and we could not adjust the tracking after all new shocks fitted.
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Banana man
- 1st Gear
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Re: Loss of brakes
Edit: I was replying to a notification, it seems I’ve missed quite a bit since then 
Yea I agree to be fair, unless it was a complete internal failure of the servo then yea it’d just be a hard pedal.
Only other option is the OP confused a hard pedal with going to the floor, it’s easily done when you panic as your brakes currently don’t work and your heading towards something lol!
Yea I agree to be fair, unless it was a complete internal failure of the servo then yea it’d just be a hard pedal.
Only other option is the OP confused a hard pedal with going to the floor, it’s easily done when you panic as your brakes currently don’t work and your heading towards something lol!
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steve2003rs6
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Re: Loss of brakes
No confusion.
Initially on cold start up revs all over the place.
Brake pedal solid. stood on brake pedal and car still moving.
Vac leak on throttle bodies. Problem sorted. Not had that since.
About a month after. Went to brake and nothing foot straight to floor with no resistance. Binding rear brakes overheating brake fluid.
At present still don’t feel 100 percent. A bit spongy for the first third of pedal movement then the brakes bite.
Need to look for a cause.
Apparently brake booster valve, master cylinder and servo would give a hard pedal ?
So something else is amiss?
Initially on cold start up revs all over the place.
Brake pedal solid. stood on brake pedal and car still moving.
Vac leak on throttle bodies. Problem sorted. Not had that since.
About a month after. Went to brake and nothing foot straight to floor with no resistance. Binding rear brakes overheating brake fluid.
At present still don’t feel 100 percent. A bit spongy for the first third of pedal movement then the brakes bite.
Need to look for a cause.
Apparently brake booster valve, master cylinder and servo would give a hard pedal ?
So something else is amiss?
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steve2003rs6
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- Posts: 2956
- Joined: Mon Aug 19, 2019 7:43 pm
Re: Loss of brakes
Still have a problem with spongy brakes.
Read on here that a member had air in the system and it took 1 1/2 hours to get it sorted.
Hopefully I have a similar problem.
From what I have heard.
Faulty master cylinder and servo would give a hard pedal ?
Brake booster valve would also give a hard pedal
Any recommendations would be much appreciated.
Booked car in again for 02/10/19.
Garage thinks air lock ?
Just want to get the final bit sorted after all the work I have had done.
Thank you all. Regards Steve.
Read on here that a member had air in the system and it took 1 1/2 hours to get it sorted.
Hopefully I have a similar problem.
From what I have heard.
Faulty master cylinder and servo would give a hard pedal ?
Brake booster valve would also give a hard pedal
Any recommendations would be much appreciated.
Booked car in again for 02/10/19.
Garage thinks air lock ?
Just want to get the final bit sorted after all the work I have had done.
Thank you all. Regards Steve.
Re: Loss of brakes
How spongy are they? Are your expectations realistic?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Loss of brakes
Shopp , is there not a way too purge the abs block through VCDS? . It's not a controller I've ever been into on mine . Could be worth a shot if it is air
Cheers Al
04 c5 rs6 , Ebony Black, Bare shell repaint , Milltek's, PSS9's,Hotchkis Arb's,Gutted precats, hybrid turbos, Bosch 044 ,And an annoying EML light
04 c5 rs6 , Ebony Black, Bare shell repaint , Milltek's, PSS9's,Hotchkis Arb's,Gutted precats, hybrid turbos, Bosch 044 ,And an annoying EML light
Re: Loss of brakes
No, you just bleed in the normal way. Albeit starting at the front left. Then right. Then rear left then right. Although I’m pretty sure it makes no difference.
Mine were spongey when I changed the calipers, despite me doing it by the book. Did it again and it was ok.
Steve, get an EZbleed and do it yourself. It’s not difficult.
Mine were spongey when I changed the calipers, despite me doing it by the book. Did it again and it was ok.
Steve, get an EZbleed and do it yourself. It’s not difficult.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Loss of brakes
It also might help too get the abs too kick in a couple of times if you can . If there is a bubble or too sat in the valves it should dis lodge them and get them into the mines where you can bleed them out . As Shop said though , get an EZbleed and purge the system manually .what fluid have you got in there ? .
Cheers Al
04 c5 rs6 , Ebony Black, Bare shell repaint , Milltek's, PSS9's,Hotchkis Arb's,Gutted precats, hybrid turbos, Bosch 044 ,And an annoying EML light
04 c5 rs6 , Ebony Black, Bare shell repaint , Milltek's, PSS9's,Hotchkis Arb's,Gutted precats, hybrid turbos, Bosch 044 ,And an annoying EML light
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steve2003rs6
- Cruising
- Posts: 2956
- Joined: Mon Aug 19, 2019 7:43 pm
Re: Loss of brakes
Thank you guys.
I am just going by 7 years of driving the car. Brakes are nothing like as positive as they was. So soft and spongy until they bite.
Have no confidence in them especially after foot to the floor and zero resistance after that needed a change of underwear.
Wife giving me grief to sell. AGAIN.
That is not an option ! So desperate to fix the problem at whatever cost !
Hope it is as simple as a bleed.
Am I right with the above hard pedal. Master cylinder servo and brake booster valve.
Been racking my brain re events.
1 st time braked working ok then foot just went to the floor. L as if something snapped.
2nd time it happened about a month later foot straight to the floor no resistance at all.
Thought we sorted it out with binding brakes overheating the fluid.
But sorry to say still just don’t feel like they did for the last 7 years.
Just for info. When I used to start the car with foot on brake pedal. You could feel the brake pedal move on start up.
Don’t get that at all anymore.
Sorry to be a pain. But it’s driving me crazy having to leave distance between me and the car in front.
Ps
Brake fluid changed at unit 20. So confident fluid is to spec.
Thanks all. Regards Steve.
I am just going by 7 years of driving the car. Brakes are nothing like as positive as they was. So soft and spongy until they bite.
Have no confidence in them especially after foot to the floor and zero resistance after that needed a change of underwear.
Wife giving me grief to sell. AGAIN.
That is not an option ! So desperate to fix the problem at whatever cost !
Hope it is as simple as a bleed.
Am I right with the above hard pedal. Master cylinder servo and brake booster valve.
Been racking my brain re events.
1 st time braked working ok then foot just went to the floor. L as if something snapped.
2nd time it happened about a month later foot straight to the floor no resistance at all.
Thought we sorted it out with binding brakes overheating the fluid.
But sorry to say still just don’t feel like they did for the last 7 years.
Just for info. When I used to start the car with foot on brake pedal. You could feel the brake pedal move on start up.
Don’t get that at all anymore.
Sorry to be a pain. But it’s driving me crazy having to leave distance between me and the car in front.
Ps
Brake fluid changed at unit 20. So confident fluid is to spec.
Thanks all. Regards Steve.
Re: Loss of brakes
I forgot that you were well used to the car.
Maybe the master cylinder is failing.
I’d still try bleeding again first.
Maybe the master cylinder is failing.
I’d still try bleeding again first.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
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steve2003rs6
- Cruising
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- Joined: Mon Aug 19, 2019 7:43 pm
Re: Loss of brakes
Did discuss failed master cylinder and servo and brake booster valve.
Was told these would all result in a hard pedal ?
Was I informed correctly?
Mint car. Love her. This is sending me nuts. Everyone is telling me it’s fine.
But I know it isn’t. Just does not feel like she used to. Gone from really positive to vague and spongy.
She is booked into a vw audi garage on 2nd sept. Used to do work on my cars but not this one.
I hope I know my limitations ?
Regards Steve.
Was told these would all result in a hard pedal ?
Was I informed correctly?
Mint car. Love her. This is sending me nuts. Everyone is telling me it’s fine.
But I know it isn’t. Just does not feel like she used to. Gone from really positive to vague and spongy.
She is booked into a vw audi garage on 2nd sept. Used to do work on my cars but not this one.
I hope I know my limitations ?
Regards Steve.
Re: Loss of brakes
No reason you can’t work on the RS6. It’s just a regular car with the complexity dial turned up to 11.
Master cylinder could result in a soft pedal, or pedal going to the floor. Not just hard pedal.
Master cylinder could result in a soft pedal, or pedal going to the floor. Not just hard pedal.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
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steve2003rs6
- Cruising
- Posts: 2956
- Joined: Mon Aug 19, 2019 7:43 pm
Re: Loss of brakes
Thank you for the advice. Will look at the master cylinder next if bleeding doesn’t cure the fault.
Re: Loss of brakes
Is the pedal soft from cold? Or is it after you've driven for a while?
Has your hard pedal problem gone now?
What happens if you start the car and keep your foot on the brake pedal for a few minutes? Does the pedal sink?
Has your hard pedal problem gone now?
What happens if you start the car and keep your foot on the brake pedal for a few minutes? Does the pedal sink?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."