Urgent help needed, (1 Viewer)

[michelle wilson 76]

Hi guys , we have recently purchased a 2004 eura mobil 2.8 jtd fiat ducato base . We are due to leave the UK on Friday, heading for the south of spain , previous owner had it sat in a field for god knows how long.
The Vehicle has been serviced , and had a new mot when we bought it . BUT whilst husband was taking it for a drive recently , he noticed that whilst braking, he is getting juddering through the brake pedal.
The whole of the underneath has been stripped and cleaned , numerous times trying to find the issue.
We have now replaced the suspension , brake shoes , discs , pads, drums , brakes have been bled a couple of times now , and a diagnostic test picked up no faults on the van or abs unit, we are now about to replace the master cylinder , in a desperate attempt to try and save our holiday ,and sanity .
I was wondering if anyone has had any similar problems , or any suggestions as to the cause ..

 

[Tombola]

Faulty ABS sensor if it has it ?

or one side locking up and abs kicking in

 

[Figaro]

How bad is the judder ?
Sounds like you have already replaced the likely culprits
Was it noted on the recent MOT ? presumably brake performance was satisfactory

 

[Figaro]

Faulty ABS sensor if it has it ?

or one side locking up and abs kicking in

It will have ABS

 

[michelle wilson 76]

Thanks tombola I will get him to check it , would that fault have flagged up on the diagnostic test .?

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[Sasbo]

Have you checked that one of the tyres is not deformed. Just had a similar thing happen on a friend's motorhome and one of the tyres had a deformed casing.

 

[michelle wilson 76]

How bad is the judder ?
Sounds like you have already replaced the likely culprits
Was it noted on the recent MOT ? presumably brake performance was satisfactory

I'm told the juddering is intermittent, nothing on the mot, have had 4 people looking at it , non of them seem to think anything is locking up .

 

[michelle wilson 76]

Have you checked that one of the tyres is not deformed. Just had a similar thing happen on a friend's motorhome and one of the tyres had a deformed casing.

Just had 6 new tyres fitted , but i will get them checked,

 

[Silver-Fox]

Check the discs and pads.

Possibly warped discs.

 

[Chipster]

Stuck calliper?

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[michelle wilson 76]

Check the discs and pads.

Possibly warped discs.

Thankyou for the reply . everything is newly fitted , and has all been checked with a dti gauge

 

[repairer]

Then if pads and disks are new it smacks of an abs issue.

I am assuming it will have abs.

 

[michelle wilson 76]

Stuck calliper?

Thankyou for the reply , callipers and sliders were removed , checked , cleaned, lubricated yesterday ,

 

[meanders]

My bet would be the ABS kicking in. It's done it to us a couple of times when coming off a muddy field.

 

[Tombola]

easy enough to disable ABS if you are in a hurry

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[michelle wilson 76]

easy enough to disable ABS if you are in a hurry

We did removed the fuse for the abs , and it still judders

 

[Ridgeway]

Easy to do and free but maybe swap the front wheels over, just rules something else out.

Good luck.

 

[michelle wilson 76]

Easy to do and free but maybe swap the front wheels over, just rules something else out.

Good luck.

Thankyou for your reply , I will get them to do that tomorrow , to see if it makes a difference.

 

[herald_400rl]

I had this on one of our old cars, sat for about 7 months without moving. It snowed one day and I couldn't bother walking to work so sparked it up and everything worked but it juddered under braking. Replaced pads and discs and still there so rebuilt the calipers with a rebuild kit and it went away.

 

[Gromett]

Get the sliders on the calipers taken out, cleaned. check the rubber boot on them while you are it.
If it has been sat for a very long time I would replace the sliders with a full service kit.

I had exactly the same issue with a 2007 Eura mobil and then again on a Ducato 2.8JTD

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[treblid]

Just had 6 new tyres fitted , but i will get them checked,

Were they balanced properly? I have had vehicles judder as you apply the brakes and it has just been poor wheel balancing.

 

[Swifter]

Any idea on this one Northernraider ?

 

[Kelvin8tor]

on the rear axle there is a load compensation valve which adjusts the amount of braking on the rear depending on the loading ( weight) on the rear axle is this working correctly they are prone to seizing
if it has failed the rear brakes may be thinking that the van is at max weight and allowing maximum rear brake force which could momentarily lock the rear wheels causing the abs to cut in causing the pedal judder
worth a look

Fits Fiat Ducato Peugeot Boxer Citroen Relay Brake Compensator Load Valve 46833604

New Brake Compensator Fits Fiat Ducato, Peugeot Boxer And Citroen Relay (1994-2006) Be Aware There Can Be More Than One Option Fitted To These Vehicles. So Please Check Part Numbers Before Ordering.

coastalmotorhomes.co.uk

 

[michelle wilson 76]

Get the sliders on the calipers taken out, cleaned. check the rubber boot on them while you are it.
If it has been sat for a very long time I would replace the sliders with a full service kit.

I had exactly the same issue with a 2007 Eura mobil and then again on a Ducato 2.8JTD

Thankyou grommet , I will look into that .

 

[michelle wilson 76]

on the rear axle there is a load compensation valve which adjusts the amount of braking on the rear depending on the loading ( weight) on the rear axle is this working correctly they are prone to seizing
if it has failed the rear brakes may be thinking that the van is at max weight and allowing maximum rear brake force which could momentarily lock the rear wheels causing the abs to cut in causing the pedal judder
worth a look

Fits Fiat Ducato Peugeot Boxer Citroen Relay Brake Compensator Load Valve 46833604

New Brake Compensator Fits Fiat Ducato, Peugeot Boxer And Citroen Relay (1994-2006) Be Aware There Can Be More Than One Option Fitted To These Vehicles. So Please Check Part Numbers Before Ordering.

coastalmotorhomes.co.uk

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[NicM]

Can it be felt on MOT rollers? May help you find something.

 

[michelle wilson 76]

Thankyou for your reply, thats one thing that we haven't heard of , I will be looking into that .

 

[michelle wilson 76]

Can it be felt on MOT rollers? May help you find something.

Sorry ,I have no idea . There was nothing on the mot paper

 

[Gromett]

on the rear axle there is a load compensation valve which adjusts the amount of braking on the rear depending on the loading ( weight) on the rear axle is this working correctly they are prone to seizing
if it has failed the rear brakes may be thinking that the van is at max weight and allowing maximum rear brake force which could momentarily lock the rear wheels causing the abs to cut in causing the pedal judder
worth a look

Fits Fiat Ducato Peugeot Boxer Citroen Relay Brake Compensator Load Valve 46833604

New Brake Compensator Fits Fiat Ducato, Peugeot Boxer And Citroen Relay (1994-2006) Be Aware There Can Be More Than One Option Fitted To These Vehicles. So Please Check Part Numbers Before Ordering.

coastalmotorhomes.co.uk

They have tried disabling the ABS and still judders. I had a seized compensation valve and all it did was reduce the effectiveness of the rear brake. Failed MOT 2 years on a row on that one.

 

[Gromett]

Sorry ,I have no idea . There was nothing on the mot paper

When you do fix it can you please come back and let us know what was the cure please. Thank you

Always nice to know when some gets a problem fixed and what it was.