2.0 tdi BRE juddering

E_KEL95

E_KEL95

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As per title my 07 2.0 tdi is juddering between 1k and 2k rpm similar feeling to driving the car and pushing then releasing then pushing the throttle again it's most noticeable in 1st and 2nd gear but today I felt it in 3rd coming up to a road end. My first thought was maybe fuel filter as I had a bad habit of running the car right down to empty but my local mechanic reckoned airflow meter, it doesn't do it all the time now which is a problem as these faults are hard to find. Anyone had anything similar and where is the best place to start looking?
 
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yep i'd start there too mate, mines been doing it, i'm going to take all that out of mine and map them out in a few weeks
 
Sounds like a possible manifold flap actuator.....I had a similar problem as have plenty of others.

To do it you have to remove tfhe anti-shudder valve, EGR & manifold to replace it, but it gives you an excuse to get them cleaned up inside.

One way to test the valve is to either put a piece of hose onto it and suck....it moves quite easily or remove the existing pipe and push the rod into the diaphragm, block the hole with your finger and see if it holds vacuum.

At the end of the day it comes in around the £20 mark for a new actuator and gaskets.....
 
carlcall said:
Sounds like a possible manifold flap actuator.....I had a similar problem as have plenty of others.

To do it you have to remove tfhe anti-shudder valve, EGR & manifold to replace it, but it gives you an excuse to get them cleaned up inside.

One way to test the valve is to either put a piece of hose onto it and suck....it moves quite easily or remove the existing pipe and push the rod into the diaphragm, block the hole with your finger and see if it holds vacuum.

At the end of the day it comes in around the £20 mark for a new actuator and gaskets.....
Click to expand...

Are you on about the flap on the anti shudder valve or what your on about below the manifold to the left of the egr?
 
The one on the front of the engine.....I have a better picture somewhere but you will see which one.

f74526f2b7412923188a346b1833c803.jpg



Sent from my iPhone using Tapatalk
 
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How do ones get cleaned in round the manifold so well ?
 
Mine does the same i started with the mass airflow sensor but nothing changed . I had it setup on top of the line diagnostics software they could not find anything and my engine would not put out any codes just a blank reeding .
 
carlcall said:
The one on the front of the engine.....I have a better picture somewhere but you will see which one.

f74526f2b7412923188a346b1833c803.jpg



Sent from my iPhone using Tapatalk
Click to expand...

Do you have a part number for that? My dealer was really unhelpful so I just gave up and thought i'd try again another day when someone different answers the phone...

OP: mine does exactly the same as this, and I have same engine as yours: read that this is quite likely the cause on several forums.
 
Yes Arnie.....

S03G129061C - Actuator

You'll also need the three gaskets for the manifold, manifold to EGR and the EGR to throttle flap assembly.

S03G131547F, 069131547D and S03G129717D.

And a can or two of Mr Muscle Oven Cleaner to clean all the gunk out of the manifold and EGR.
 
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Lovely, thanks very much for that. Can't be unhelpful with he part numbers now can they!
 
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Does your car have the metal intake manifold or plastic one ? As far as I know only the plastic one had the flaps ! I use the metal manifold as upgrade to any 2.0tdi when mapping as it can run a lot more boost without fear of splitting the plastic manifold !
 
I've never seen a plastic manifold....but all the metal ones I've seen have had the flaps.

2016 05 22 171722


And this is what the diaphragm looks like inside when it's been causing the juddering

2016 05 21 162735
 
Here's the alloy one I replace the plastic with...notice there's no flaps in the metal one but they are in the plastic jobbie...
 

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Maybe that's because it's not on an A4 as the engine is transversely mounted.....weird one that as I thought all A4's had the flaps.


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audi upgrades
carlcall said:
I've never seen a plastic manifold....but all the metal ones I've seen have had the flaps.

View attachment 103910

And this is what the diaphragm looks like inside when it's been causing the juddering

View attachment 103913
Click to expand...

Been thinking about this if the actuator is at fault like the one pictured would the split not cause the problem all the time? Just a thought
 
That's what I thought. But the split looks like it's been trapped in the first place for this to happen and it only did it at certain revs or when the pedal was down so far, a quick blip on the throttle and all would be fine again.


Sent from my iPad using Tapatalk
 
Yeah I understand what you mean, I'm guna order one if there not that expensive and see of that cures it.

Only problem is its the type of fault that might not happen for another week or so of driving so you always think you've it sorted
 
audi upgrades
carlcall said:
Maybe that's because it's not on an A4 as the engine is transversely mounted.....weird one that as I thought all A4's had the flaps.


Sent from my iPhone using Tapatalk
Click to expand...
The picture I took was the replacement/upgrade on a Audi A3 running a gtb turbo however the manifold came of an a4 2.0 tdi from 2006. They were fitted on early models due to running punchy little turbos that ran high boost, later models got lazier turbos which are flowing much better and are more efficient !
 
Ive tried ringing my local dealer and the part number above isnt coming up on their system. Is there possibly another number for this part?
 
Got sorted with that part number thanks! Hopefully this sorts the issue out will know in a few days when the part arrives
 
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Installed this on Saturday, the actuator was definitely faulty as it had a tear in it like the one pictured above, now it has seemed to help the judder it still does it slightly but definitely not as violently as it use to now im guessing this would be the shudder valve at fault?
 
I had a similiar issue for months on end... x2 new vac actuators, inlet off and cleaned with new gasket, anti judder & throttle body cleaned, thrust sensor changed and even a TerraClean...

Turned out the air filter had got wet somehow & literally fell apart.
 
Revisiting this problem

I've been driving the car as normal and it's definitely cured some of the problem as it seems to do it less frequently and violently. Been thinking would this be more due to the EGR valve opening and closing than the judder valve as it's only used for when the engine is switched off ? Am I right in thinking that
 
yes mate your right, but you'll need to see it working to know its ok, it could be stuck half way or more or not at all, unbolt it and let it sit some where so you can see it working when you turn the car off, it should be open until you turn the engine off, then it will close (stopping the air to the engine) and open again when the engine has shut down.
 
I'll have a look , I was thinking of installing an EGR delete and getting my map adjusted to suit hoping that will sure the problem
 
Right I installed the egr blank as I was originally going to do. Placed it between the pipe and the egr itself as it was the easiest got to. Now the car drives with no power at all, when the airflow is disconnected it drives normal again is this due to the EGR now needing to be mapped out ?
 
Right I installed the egr blank as I was originally going to do. Placed it between the pipe and the egr itself as it was the easiest got to. Now the car drives with no power at all, when the airflow is disconnected it drives normal again is this due to the EGR now needing to be mapped out ?
 
what do you mean mate, "when the airflow is disconnected" ???
you'll need to map the egr out but it should still run and it'll chuck a light up on the dash
 
Autocorrect meant to say airflow meter disconnected it drives normal, but when it was connected it drove with no power
 
that may be where to start then buddy, could be dirty or knackered mate you can buy maf sensor cleaner in most auto shops you could try that before you shell out for a new one ???
 
Is it normal for that to happen when blanking the egr ? ill have another look tomorrow
 
did mine at the same time as the map so not sure ??? dont think it would though
 
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Just found on on another thread that it does does happen do going to ring my mapper tomorrow and hopefully they can sort it out
 
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