2.0TDi Lumpy idle

[Camper67]

Hi I posted a thread a few weeks ago regarding a lumpy/rough idle on my A4 2.0TDi 55 plate. No one to date has recognised this fault other than similar faults so I am going to attempt to block off the EGR valve. I have been told to do this at the inlet manifold side as opposed to the valve itself. Anyone know of how to go about this job and is it a problem to leave it blocked off?
Many thanks!

[pitch3110]

I cannot shed any light matey, but I have noticed the same with my '06 plate

[kkp0897]

Have a word with 'a8 Tech' he certainly seems to know his onions!

[mtc]

Did you or anyone manage to source the info on this...... Defo worth doing :lol:

[Camper67]

Yes blocked off the EGR, but ran like no turbo so put it back rather swiftly. No one has come up any answers other than this is quite common. I know someone who has done loads to rectify this fault with no joy. I am now looking at having it mapped out, but would really like to know what it wrong. You would have thouht someone could have shed some light on it, but thanks for responce.

[mtc]

No worries..... I too suffer with lumpy idle, annoying but hopefully i will get to the bottom of it and post up a solution.

I'm just concentrating in Pimping my ride at the moment :)

[Camper67]

Please let me know how (if) you do get to the bottom of it as I'd love to crack this one.
If you are pimping it first then although I like you style this fault really annoys me and I need to get an answer to it before I tidy her up. Don't tell me I bet you are trying to put LED's into the headlights! Seems to be the in thing to do. Cheers!

[kaab0]

Hi all, Anyone found an answer to this one as my pride and joy has just started to run little lumpy on idle?? Driving tho is as smooth as can be, without a remap obviously!!!!!
Ive herd of lots of maybe's but no positive results as of yet thru our fellow members........EGR,DMF?? You could actually end up spending loads of hard earned cash trying to rectify this one :(

[irishejit]

did you try the MAF sensor, seems to be a common problem.
made my car run like rubbish.

[kaab0]

No not lookd into it yet, trying a fuel additive at mo to see if im lucky!!!!!!!

[STAGMAN]

I have a lumpy idle whilst warming up. When up to 90degrees it is fine. Is this what you are all experiencing? as my dealer is unable to find the problem. New EGR valve fitted.

John.

[Adman]

I have the same Stagman. Been to Audi and same thing - they can't find the problem - EGR changed. I took it to my local VAG specialist and they seem to think Audi know about this problem and is quite common. There is no fix as yet but they think Audi are working on new map for them. If I hear anything i'll let you know.

Ad

[a8 tech]

Ok post engine codes and year plus engine ecu part number including software version

Most common findings for this complaint at its worst and not the occasional blip is the tandem pump mixing engine oil and fuel or excessive soot build up, there is a software update which has been available for sometime but I need your ecu number and current sw version.The update reduces egr flow but its designed for light acceleration,however it smooths egr at idle also

EXAMPLE ECU P/N 03G 906 016 GB SW VERSION 9886

sw version 9886 is the latest version therefore no update is required



ALWAYS CHECK THE BASICS

FUEL,AIR & VALVE TIMING AND MOST IMPORTANT PREVIOUS REPAIRS

Firstly remove the fuel filter and drain into a clear container

look for excessive oil, if found take a photo and post it up


Remove the egr valve and clean it out and re adapt, if its new check fuel and fuel pressure from the tandem pump


remove the egr cooler and make sure the change over flap is intact


If you have access to vcds post egr and injector readings at idle from cold and above 80 c oil temp.Pay attention to measured value block 42 egr offset

also check the valve timing is correct as this causes the same fault and tweaking it helps. Check value +/- 3° for synchronisation angle/valve timing

check fuel pressure

LOOK AT THE OLD TIMING CUT OUT ON THE GEARBOX FOR GREY GREASE INDICATING THE DMF IS STARTING TO GIVE


TAKE INTO ACCOUNT ITS WINTER AS WELL BEFORE SPENDING WASTED HOURS AND MONEY AS WELL AS EGR ACTIVE CYCLES WHICH WILL UNBALANCE THE ENGINE SLIGHTLY UNTIL FUEL INJECTION CALIBRATION ADDRESS COMBUSTION

ADMAN YOUR INFO SOURCE IS WRONG AND FOBBING YOU OFF WITH THE OLD DEALER WILL FIX IT METHODOLOGY ASSOCIATED TO THE UNEDUCATED.LOL

[Adman]

Mine has had the lumpy idle on cold since I had in August so don't think anything the temperature now could effect. It was in and out of Audi for a few weeks but they couldn't diagnose the problem. Its only since my warranty run that I took it to the VAG specialist (I use the term loosely!)

Like i said before its had a new EGR and also injector seals under warranty but that never sorted it.

I would love to do all of the diagnosing you suggest, but I just don't have the tools, know how or even more so, the confidence to take my baby to bits!

I've just learn't to live a shaky car from cold!

[kaab0]

Good deal of good info there A8, Mine has just started being Lumpy when warm over the last two weeks, it had an occational blip throughout its term with me (18mths) which i lived with, but now has just increased as being permanant.
I have my relative who is going to go over the EGR and Throttle housing for soot build up as you suggested A8, as he suggested the same being an (x-Audi Tech). Will ask him if he has time to look into the other info and go from there. Sooo so Annoying when sitting at a red light :(.

p.s. everytime i read a problem on this forum it then happens to me :zx11:.

[Richardhillman]

My 2005 A4 has had a similar problem. noisy engine for the last 12 months or so, then it developed a rythmic 'droning' which was always worse when cold. for me it turned out to be related to the oil pump, its driven by a chain and the sprockets have gone. AUDI do know about this problem but dont really let on (one of the mechanics came out and said its a common fault, they do them all the time).
Worst of all, the parts have all superceded to a complete new 'spur gear drive' (which does away with the need for the chain), mega money to replace!

[a8 tech]

correct but this is a different compliant and associated with worn oil pump gear teeth being the most common failure also highlighted by the red oil warning light coming on

[Camper67]

Still not got to the bottom of this yet. I have been trying to see if I can live with it. I've established it slightly hesitates under load at approx 1800 rpm. I'm going to remove the EGR and see i there's anything obvious. Tried addative with no joy.
What is the MAF sensor and where is it?
Cheers!

[a8 tech]

Your symptoms require the software update for egr as I mentioned previously.Please post your engine ecu p/n and current sw version

[Adman]

I have the same at about 1800 rpm. I can only describe it as a flutter or even missing.

I do not have access to vcds to get s/w version, i take it i could get the ecu number from the ecu itself located in the plastic box by the wiper motor.

A8, thanks for your help on this.

[a8 tech]

Adman, book your car into Audi and ask them to look at the software update for mild hesitation between 1800rpm and 2200rpm.If applicable then I'm sure this will resolve your problem.

[Adman]

Thanks A8, I shall get her booked in and get in at the earliest opportunity.

Camper maybe you should do the same.

[Camper67]

I have managed to get a few numbers from my engine ECU.
Module number - 03G997012C
WSC - 00067
Coding - 0000072

If anyone can enlighten me to what software version I have from that etc I'd be most appreciative.
Many thanks to date.

[irishejit]

Still not got to the bottom of this yet. I have been trying to see if I can live with it. I've established it slightly hesitates under load at approx 1800 rpm. I'm going to remove the EGR and see i there's anything obvious. Tried addative with no joy.
What is the MAF sensor and where is it?
Cheers!
its you will see in on the main air intake between the airbox and engine.
mine was doing the whole stutter thing.got it plugged in....no faults recoreded.
un plugged the MAF and cleaned it which made the car run like a dream but
two weeks later its doing it again so oredered a new MAF sensor.

[a8 tech]

I have managed to get a few numbers from my engine ECU.
Module number - 03G997012C
WSC - 00067
Coding - 0000072

If anyone can enlighten me to what software version I have from that etc I'd be most appreciative.
Many thanks to date.
Please post engine code

[a8 tech]

its you will see in on the main air intake between the airbox and engine.
mine was doing the whole stutter thing.got it plugged in....no faults recoreded.
un plugged the MAF and cleaned it which made the car run like a dream but
two weeks later its doing it again so oredered a new MAF sensor.
engine code please and B7 AIRMASS ARE VERY RELIABLE SO I WOULD SUGGEST THIS IS NOT THE CAUSE

[kaab0]

A8 your experience would be appreciated, I have a new problem........
since my recent start of rough idle (about three weeks now) today the engine has started to make a fast clickin noise when under load only.
Starts off at about 1800 revs but only on load.
Sounds like a blown exhaust gasket kinda sound? I sure hope its something simple especially this time of year. Will have to book car in tomorrow hoping its leading to Egr valve???
Any comments/experience's welcome

[dabsline]

Having got the update info from A8 tech [awesome guy] has anyone had any luck with their Audi dealers getting the update installed,my local dealer [wales] have never heard of it or svm code quoted to them,they will take over 100 quid but dont understand the fault mod

[a8 tech]

A8 your experience would be appreciated, I have a new problem........
since my recent start of rough idle (about three weeks now) today the engine has started to make a fast clickin noise when under load only.
Starts off at about 1800 revs but only on load.
Sounds like a blown exhaust gasket kinda sound? I sure hope its something simple especially this time of year. Will have to book car in tomorrow hoping its leading to Egr valve???
Any comments/experience's welcome
Possible egr cooler pipe, the corrugated section can split or the change over valve can break away but as I cant hear it that's just my thoughts.Or turbo arghhhhh

[P CRR]

My EGR cooler pipe split. Sounded like my exhaust had fell off and lost all performance. I think the part was around £250 as had to buy cooler not just split pipe and its a dealer part only,

[kaab0]

Possible egr cooler pipe, the corrugated section can split or the change over valve can break away but as I cant hear it that's just my thoughts.Or turbo arghhhhh

WELL!!!!! Just a bit worse A8 :zx11: Finally found out what the clicking noise was for all who was interested!!! Only but when it was too late!!! Im hurting and still cying :( :mad:.

Wait for the shock........................F-----G Cam Belt went at 59000miles. Where do i stand the question is??? 80000miles the service book states, wouldnt of waited until then anyway, but at 59000???
My pride & Joy is now dead and awaiting full inspection. Just dont know which way to turn, Audi Uk most definately. Only my bad luck........A Good will gesture im hoping for, lets see what Audi thinks of there customers having such bad luck??? Christ help me........ Its Christmas.

[a8 tech]

double check the mileage as this has recently been revised and the time which I think is 4 years however the current requirements are available on Audi desktop.Not good and not common so I suspect a mechanical defect which would classed as consequential damage from possible oil pump gear failure and this in turn will be covered.The belts can exceed the recommended time and mileage so I suspect the oil pump gear has failed causing the belt to snap.

[cindacone]

Hi
I have a similar issue with a4 06 2.0 TDi lumpy idle and a pulsing hesitation until after 2200 RPM. I have a VCDS cable, can i check if the software has ever been updated by Audi?
Thanks in advance

[a8 tech]

post your engine code and a diag log showing all the ecu sw/hw versions

[cindacone]

Is this what you mean?


Chassis Type: 8E - Audi A4 B6/B7
Scan: 01 02 03 08 09 0F 11 15 16 17 18 36 37 45 46 55 56 57 65 67
69 75 76 77

VIN: WAUZZZ8E46A289238 Mileage: 138550km/86090miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 03G-906-016-BLB.lbl
Part No SW: 03G 906 016 JD HW: 028 101 265 4
Component: R4 2,0L EDC 000SG 8245
Revision: --H02--- Serial number:
Coding: 0000072
Shop #: WSC 06325 000 00000

[a8 tech]

latest sw revision for your ecu 9905 so ask the dealer to check as you are running at 8245.Just double check with vag com in address 01 as you can check if any flash updates have been carried out already

[cindacone]

Hi
where in address 1 please?
I had a remap 2 months ago when i first bought the car for better mpg. will the ecu upgrade by the dealer erase the changes? Is the newer ecu likely to fix my lumpy idle and maybe other issues ?? :-)
will Audi charge for the ECU flash or can i do it myself with VCDS?
thanks

[a8 tech]

The update is dealer only and this will overwrite the remap and possible ecu damage may occur

[cindacone]

the remap company have a copy of the original map - so could put back as was I suppose. Should they not have also checked I was at the latest ECU before doing any changes?

Is the risk of ecu damage because of the remap or just a risk of updating the software anyway? would you recommend the update because of potential benefits?

Thanks

[a8 tech]

the remap is the problem and the update controls the egr flow to prevent hesitations between 1500 to 1800 rpm and mainly associated with a fault code relating to egr.I have used the update to resolve problems without the fault code but again this was after I had eliminated all other possibilities so its no guarantee.
If the remap can be reversed then the dealer update carried out and re flashed but I will say that the responsibility lies with you if the ecu dealer flash kills the ecu which happens from time to time.Try the vehicle without the remap

[cindacone]

thanks. The lumpy idle and hesitation were there when I bought the car so I took it the the garage for a timing belt and service, they also replaced the EGR as it was causing an emission light to come on which they diagnosed as a failed EGR. I mentioned the lumpy idle and they said it was common in this car. After the remap the problem continued. There is more power and apparently better mpg.
they are now talking about replacing the injector / glow plug wiring loom under the rocker cover as a solution.
I think the best solution for me is to get it to the latest audi specified updates and maybe remap it again later. Is there any reason the updates were not carried out whilst it was in warranty? was it a recall issue?
thanks

[cindacone]

thanks. The lumpy idle and hesitation were there when I bought the car so I took it the the garage for a timing belt and service, they also replaced the EGR as it was causing an emission light to come on which they diagnosed as a failed EGR. I mentioned the lumpy idle and they said it was common in this car. After the remap the problem continued. There is more power and apparently better mpg.
they are now talking about replacing the injector / glow plug wiring loom under the rocker cover as a solution.
I think the best solution for me is to get it to the latest audi specified updates and maybe remap it again later. Is there any reason the updates were not carried out whilst it was in warranty? was it a recall issue? thanks

[a8 tech]

the update is specific to a co,plaint so therefore its not a recall or workshop action and would only be relevant if the tech referred to elsa tpi docs.The suggested repair may instruct to update the sw for the engine ecu if the ecu falls within the criterion so this needs to be established.Please post your engine code and I will check and if possible the current part number and sw version of the ecu.

[cindacone]

Hi A8 Tech
is this the info you requested? i also have the errors showing for glow plugs as shown below, and yet i recently had 4 new ones installed :zx11: Is this why they are now pointing to the wiring loom maybe?

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 01: Engine
Control Module Part Number: 03G 906 016 JD
Component and/or Version: R4 2,0L EDC 000SG 8245
Software Coding: 0000072
Work Shop Code: WSC 06325

Advanced Identification
Serial number:
Identification: BPG-810
Revision: --H02---
Date: 11.04.06
Manufacturer number: 0187
Test stand number: 1479
Flash Status
Programming Attempts: 1
Successful Attempts: 1
Programming Status: 00000000
Required Conditions: 00000001
Flash Tool Code: 00000 000 06325
Flash Date: 00.00.00
Software
P0101
U+AS8
Misc.
Hardware number: 028 101 265 4
Immo IV Challenge: A7 52 30 31
Car Info
Chassis Number: WAUZZZ8E46A289238



Chassis Type: 8E - Audi A4 B6/B7
Scan: 01 02 03 08 09 0F 11 15 16 17 18 36 37 45 46 55 56 57 65 67
69 75 76 77

VIN: WAUZZZ8E46A289238 Mileage: 139910km/86936miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: 03G-906-016-BLB.lbl
Part No SW: 03G 906 016 JD HW: 028 101 265 4
Component: R4 2,0L EDC 000SG 8245
Revision: --H02--- Serial number:
Coding: 0000072
Shop #: WSC 06325 000 00000

4 Faults Found:
005658 - Glowplug for Cylinder 1 (Q10): Open Circuit
P161A - 000 - -
Freeze Frame:
Fault Status: 01110000
Fault Priority: 0
Fault Frequency: 1
Mileage: 139807 km
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.24 V
Bin. Bits: 11000100
Temperature: -0.9°C
Bin. Bits: 00110000

005659 - Glowplug for Cylinder 2 (Q11): Open Circuit
P161B - 000 - -
Freeze Frame:
Fault Status: 01110000
Fault Priority: 0
Fault Frequency: 1
Mileage: 139807 km
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.24 V
Bin. Bits: 11000100
Temperature: -0.9°C
Bin. Bits: 00110000

005660 - Glowplug for Cylinder 3 (Q12): Open Circuit
P161C - 000 - -
Freeze Frame:
Fault Status: 01110000
Fault Priority: 0
Fault Frequency: 1
Mileage: 139807 km
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.24 V
Bin. Bits: 11000100
Temperature: -0.9°C
Bin. Bits: 00110000

005661 - Glowplug for Cylinder 4 (Q13): Open Circuit
P161D - 000 - -
Freeze Frame:
Fault Status: 01110000
Fault Priority: 0
Fault Frequency: 1
Mileage: 139807 km
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Load: 0.0 %
Voltage: 12.24 V
Bin. Bits: 11000100
Temperature: -0.9°C
Bin. Bits: 00110000

Readiness: 0 0 0 0 0

[a8 tech]

Ok there is a software update but not for these codes.As all 4 are going down and at the same time I would check the supply at the glow plugs as I suspect the voltage shown comes from the the engine control unit to the glow plug relay j179.

So I would check the activation via final control for the relay which will tell you the supply from the engine ecu and the out put from relay to the glow plugs.

If the ecu energises the output to the glow plug relay and see's 12 volts back then it determine no voltage drop hence open circuit so I would suspect the relay j179 has no out put or the loom is open circuit.Not forgetting the glow plug relay 80 amp fuse

[cindacone]

thanks - so the software update you mention may fix the lumpy idle and hesitation under 2000 RPM? or is the relay or loom more likely a culprit? the car runs great at higher revs. Where is the relay - I could maybe change it myself?

[a8 tech]

The fault codes listed will not cause hesitation but possible delayed starting.You could ask for your dealer to check any technical bulletins relating to hesitations and apply the update if valid with the latest revision

[cindacone]

will do. i will get it booked in this week.
Thanks for your help !

[cindacone]

Hi
Booked it in for the ECU update - but the audi dealer wouldn't tell me what the ECU update will do / fix. I will mention it when I drop it off and hopefully a friendly techy will explian the reason for the new software. I presume if it still has issues after the update the audi tech will realise and point me in the right direction. I have also spotted many references to leaking tandem pumps and oil getting in fuel? is this a common one in my A4 B7 2.0TDi?

Thanks

[a8 tech]

The update reduces the egr flow and the tandem pump failure is very common which also gives a similar hesitation due to oil mixing with the fuel

[cindacone]

so reducing egr flow means reducing acceleration and performance? or not...
Thanks

[a8 tech]

Makes very little difference as it reduces the activation somewhat and improves the running, but Audi never explain the true changes

[cindacone]

thanks A8- on a completely different note - do you retrofit DIS, Cruise and washer sensors - I am in bolton. If so - at what cost ?

Cheers

[a8 tech]

Parts + £50

[cindacone]

I am presuming you are an audi Master Tech? can you supply me with which parts to buy ?. why does the screen washer warning light not already work? is this a design fault or does it not come with a sensor? what extras will I get with DIS on top of the miles to refuel?
I have an office in Runcorn if that helps for installation
Audi A4 B7 2.0tdi avant 06 plate
Thanks A8

[a8 tech]

The electrical systems have differing specs as with all models but by fitting the multifunction switch and enabling the software then you can have the drivers information system.
The washer shortage indicator is not fitted to the low line spec so that needs to be added although I don normally fit the sensor but bypass it as most people just request the driver display option.
For B7 you gain a menu screen plus the mpg instead of miles till empty.

If you have a multi function steering wheel then your parts cost is around £120 ish but if not we need to establish which steering column control you have.
I suspect you will have the q or R revision which allow cruise function across the can networks but I always Like to make sure as this control unit retails around the £100 mark.


A vag com scan for address 16 would be very helpful.

[cindacone]

Address 16: Steering wheel Labels: 8E0-953-549.lbl
Part No: 8E0 953 549 Q
Component: Lenksáulenmodul 0601
Coding: 02002
Shop #: WSC 06325
No fault code found

I would rather have the washer sensor working as I got stuck recently with no water - just assumed a vehicle of this spec would tell me.

[a8 tech]

No problem and your steering control unit is fine.I will get some part prices and I will pm you the costings.

[cindacone]

Hi A8 - any news on the parts costs and when you can do the installation ? thanks

[a8 tech]

Bugger forgot, will find out asap.
I can fit in Febuary as at work and privately I'm very busy and the weather has put me back for my weekend work.

[cindacone]

OK cheers. quick question - are there any tips you can give on cold starting the 2.0 TDI? it seems really hard to start in this cold and sounds like a tractor. Should i leave ignition on for a while or pump the accelerator? there isn't a glowplug light. maybe its just my car. Its with audi for the latest engine ECU update soon which i hope fixes my rough idle, hesitation and maybe cold start. give me a date and I'll stick in diary for the mods. Thanks

[a8 tech]

The glow plug light should illuminate so posiblle issue with the circuit.
Feb 6th looks good

[cindacone]

Feb 6th it is then. will you come to me or me to you?
I didn't realise my car even had a glow plug light :confused:
audi a4 B7 2.0 tdi 06 plate.

Thanks

[a8 tech]

I think you come to me and I will pm your your cost and my address tomorrow night

[kaab0]

After having too forget about even owning an Audi over the christmas and new year due to my experience, i now have a nearly full verbal report on major engine failure, tell me what you think A8?

I opted not to go to Audi as costs would probably escalate to more than what the cars worth! (still may?) Ive been down to the garage and seen my pride and joys front end including engine top end completely stripped down, ive been shown the after math of an exploded Flywheel assembly, which in turn ceased crnk causing belt to just slip and not i hope cause damage to head/valves. Is this possible??
The head has been removed and checked and hpe no other damage has been caused throughout.
The DMF assembly exploding causing the above, possible???

[a8 tech]

I have never had any consequential damage to the engine and cant understand how the dmf can cause the crank to lock up as that would take some severe force to stop the crank but there is always a first.
So are they saying you need a new short motor and can the crank rotate or is it locked.

[kaab0]

I suppose the crank now turns as they saying that the cause was the failed dmf/clutch assembley?? you got me thinking now!! the head had been removed to check for valve damage as theinitial problm was bein the belt, as the crank wouldnt rotate on quick inspection. Hmm. Sure hope nothing else is found when they assemble?
At the moment new belt/pulleys,waterpump,gasket kits,clutch dmf........

[a8 tech]

so instead of fitting the dmf then fitting a belt to check if the engine rotates without contact they took the head off to inspect the valves?

[cindacone]

Hi A8
I had the recall for new software version installed today for my A4 by Audi FOC. it was an engine update and now takes me to the following version:

Address 01: Engine Labels: 03G-906-016-BLB.lbl
Part No SW: 03G 906 016 JD HW: 028 101 265 4
Component: R4 2,0L EDC 000SG 9643
Revision: --H02--- Serial number:
Coding: 0000072
Shop #: WSC 00613 210 91782

good thing is it has stopped the hesitations between 1500 - 2000 RPM ! and I told the tech about the glow plug light not coming on and the glow plug errors in Vagcom - open circuit. After the software they diagnosed it needing new glow plugs (already had all 4 changed 3 months ago!) and / or a new controller unit, fuse and relay. This was goin to cost me £180 without the plugs.
Funny thing is - the glow plug light now comes on, and I have scanned it tonight - all Error free ! ;) Has the new software fixed my glow plug issue aswell? or has the audi tech fixed it inadvertantly??
bad thing is - i think the remap has been overwritten - feals less torquey :mad:
The idle is still lumpy though - I might have the injectors cleaned ultrasonically.

[a8 tech]

This week I have seen the glow plug fault code on 3 vehicles so I suspect the relay is hanging the secondary and this causes the fault code.When the ecu is flashed and the codes are cleared then the circuit will once again function as there are no dtc recorded.
Glad the fault is cleared and the sw version is the latest but I have mentioned before the flash update will wipe the remap

[kaab0]

so instead of fitting the dmf then fitting a belt to check if the engine rotates without contact they took the head off to inspect the valves?

The initial prob. was thought to be belt failure leading to damaged head resulting in engine lock up. I suppose clutch/dmf would not of been even thought about at that time? The belt had a flat so i'm assuming once removed and crank still not turning they moved on?
Just want problem solved, fancy coming to London :confused:

[a8 tech]

oops, so its just the dmf then and the clutch
I would negotiate a repair cost as they have misdiagnosed the fault incurring unwanted extra cost.
It appears that the tech has made the wrong decisions and just gone at it like a bull in a china shop.
If this repair came under the manufactures warranty then the claim would be rejected and only the actual cause paid out so why should you pay out for there incompetence

All to common down south lol

[kaab0]

I will be asking further questions but just want it sorted now, and to spec hey, will inform you of any additional findings..... if any!!!

[cindacone]

Hi A8
do you know whether the engine ecu software update restricts revs whilst stationery to 3000 RPM? mine does this now but ok once moving ?? seems strange to me:zx11:

[a8 tech]

Yes it the latest sw version restricts the rpm at idle.
Pm me your reg so I can the colour code for your lower steering cowling

[cindacone]

spoke too soon yesterday about the glow plug errors - they came back today and caused an emission light to come on - cleared it with vagcom.
Is it an easy job for me to change the glow plug controller and or relay and fuse? thanks

[a8 tech]

I will look at it when I retrofit the dis and cruise but for know just clear it down

[cindacone]

excellent thanks !
just let me know nearer the time your address etc. Do you want me to buy the parts beforehand ? if so , send over part numbers etc.

Thanks again !

[kaab0]

I have never had any consequential damage to the engine and cant understand how the dmf can cause the crank to lock up as that would take some severe force to stop the crank but there is always a first.
So are they saying you need a new short motor and can the crank rotate or is it locked.


Well finally got my motor back with no more lumpy idle and shaking seats hooraay!!! Now smooth as can be but with the cost of like i said, new dmf,clutch,water pump, cam belt/Kit, head gsket/Kit, head bolts and lots of investigation/ labour!!!!

I was shown the failed DMF/Clutch assembley, well what was left of it and the belt with three shredded teeth.
Like you said always a first and wont be the last a DMF exploding leaving bits behind jamming up the crank causing seizure. Inturn damaging belt and nearly the head.
So glad i was stationary at the time. The rough lumpy idle and the clicking noise (at 1800 revs on load) was due to the Dmf ready to fail.

Lots of problems with these B7 TDIs which is a real shame for such a good looking car. My first Audi with a real bad experience.
Oh well sure hope all goes well from now on and good luck too all other owners with there lumpy idle issues........

[cindacone]

A8_Tech
Just to say thanks for the top job done on my retro fit cruise, DIS and washer sensor on my A4 B7 2.0TDi. This guy really knows his onions and is very helpful and easy going! If you want it doing i recommend you pm him - top bloke :beerchug::biglaugh:

[audituning]

I share my knowing about MB world. In those MercedesBenz Sprinters (latest models) has this strange thing that glow plug relay is broken and IT brokes glow plugs. If you just change broken Glow plugs, those glow plugs will go down soon because of that broken Relay.


Could this be problem in Audi's?

[mya4audi]

The rough lumpy idle and the clicking noise (at 1800 revs on load) was due to the Dmf ready to fail.

Hi
I have a B7 2.0TDi A4 that has intermitent lumpy idle and a hesitation when pulling away and also a clicking noise whilst i am mobile that sounds as if its coming from behind the dash. Clicking is quite slow and quiet ( sounds like something circular tapping on a plastic cover) if you know what i mean.
Do these sound like the same issues you had. I read on another thread it could be a simple injector loom replacement could cure the problem but dont spose i am that lucky.
Any thoughts anyone?

[Puresilk]

When idling, and it happens only sometimes, usually when the car is warm, there is a slight shake in the car coming from the engine and you can feel it through the car but then it goes after a while.

Never have found the fault!

[crmason]

My car used to hunt and miss when idle. I changed the fuel filter and it cleared up. Coming back now though :(

[a8 tech]

My car used to hunt and miss when idle. I changed the fuel filter and it cleared up. Coming back now though :(
check for excess soot/oil in the fuel

[crmason]

check for excess soot/oil in the fuel


a8 tech. Can you check out my thread please and give advice. I would be extremely grateful.

Many Thanks.

http://www.vwaudiforum.co.uk/forum/showthread.php?t=102063

[mya4audi]

Just an update.
My 55 A4 was missing on idle but only before the engine reaches running temp and not everyday. I have put a new injector loom in but this has not cured the problem but it has improved a little. Has anyone got any ideas that might help justify why my engine misses when idling?

Mike

[a8 tech]

Yes its possible any of theses suggestions

soot build up on the injectors and inlet/egr also fuel pressure loss from poor injector seats and fuel contamination from oil/soot build up in the fuel tank from either poor seated

injectors or tandem pump internal leak.

Does that cover it, O also consider the ecu sw version for the latest revision to improve egr cycle.

I presume some one on a forum told you the loom would fix it and now you no it has jack **** to do with it and the injector loom is becoming the new airmass meter diy fix which does not fix

Sorry not being rude but so many people talks bo ll ocks on forums its costing punters a fortune in guess it parts


There will always be combustion imbalance when in warm up phase

basics

valve timing (had a cam belt fitted) over advanced on the exhaust cam from incorrect locking tools used or worse still tippex

fuel quality

air filter and inlet free from clogging

air leak from intake/vacuum circuit

egr obstruction

fuel pressure

engine ecu basic setting (battery disconnected at any time and never reset the basic setting for egr)

[ukdan]

engine ecu basic setting (battery disconnected at any time and never reset the basic setting for egr)

is it possible to re-set with vcds and if so, how?

[a8 tech]

Performing adaption of exhaust gas recirculation valve (EGR valve)

Switch off ignition.

Switch on ignition, wait for 1 to 3 seconds and then switch off again.

The ignition must remain switched off for at least 45 seconds. During this time (control unit power supply is maintained for this period) the adaption of the EGR valve is performed

automatically.


Switch on the ignition again and check the offset programmed value under engine electronics - measured values - measured value block 42 - value 1: With 0 km vehicles the value is around -16 % +-3 . For every 10000 km the offset programmed value moves about 1% towards 0.

Example: running period 40000 km = -12 % +-3 % or 80000 km = -8 % +-3 %. But these are not definite figures, as the running period of the vehicle can differ from that of the component (for example if the exhaust gas recirculation valve was replaced).

[mya4audi]

Yes its possible any of theses suggestions

soot build up on the injectors and inlet/egr also fuel pressure loss from poor injector seats and fuel contamination from oil/soot build up in the fuel tank from either poor seated

injectors or tandem pump internal leak.

Does that cover it, O also consider the ecu sw version for the latest revision to improve egr cycle.

I presume some one on a forum told you the loom would fix it and now you no it has jack **** to do with it and the injector loom is becoming the new airmass meter diy fix which does not fix

Sorry not being rude but so many people talks bo ll ocks on forums its costing punters a fortune in guess it parts


There will always be combustion imbalance when in warm up phase

basics

valve timing (had a cam belt fitted) over advanced on the exhaust cam from incorrect locking tools used or worse still tippex

fuel quality

air filter and inlet free from clogging

air leak from intake/vacuum circuit

egr obstruction

fuel pressure

engine ecu basic setting (battery disconnected at any time and never reset the basic setting for egr)

A8 tech
I guess you see alot of this..dont think you are rude at all. As you can tell what i know about cars you could fit on a stamp. The injector loom could probably have done with being replaced anyways 121k. In a nutshell are you saying it could be any one or a combination of these things and i should possibly get a diagnostic done first. I find it hard to trust main dealers so would prefer to use a recommended tech if i could. my local audi has already told me a diagnostic would cost £120, is that about right? I can see you know your onions but you are im guessing several hundred miles from me, is there anyone who can be recommended nearer to me? how would i go about getting the sw revision?
Appologies for all the questions
Mike

[Jamie Moore]

A8 tech

I have been reading the above article on 2.0TDi Lumpy idle (http://www.vwaudiforum.co.uk/forum/showthread.php?74065-2.0TDi-Lumpy-idle/page3&) and having been to audi, all they had to say was that they could not do anything for me without me pay £156 to put it on the computer. Nice! They then said if they did not find any fault code then they could not guarantee any fix, everything (including the costs) would be based on a 'best guess' scenario.
So I was hoping to see if you could help. I have a 2007 A6 20 tdi (140) that is lumpy/jerky between 1500 - 2000 rpm. I am based in Leeds LS28 and although this problem does not seem to causing any damage, I am bored of it now (and slightly embarrassed when I give people a lift).
Could you please let me know what you could do to help and the associated cost.
many thanks
Jamie
PS, apologies, but I could not PM this as I do not have a high enough post count.

[bluevortex]

I feel your pain and also having a similar prob with 2006. I've had wheels balanced twice now and both times they're out! I'm wondering if it's break disc related as I paid for diagnostic which ended up in a new engine mount. This did not fix the problem but being 70g out did improve the ride considerably.

Need a fix for this

Blue

[a8 tech]

A8 tech

I have been reading the above article on 2.0TDi Lumpy idle (http://www.vwaudiforum.co.uk/forum/showthread.php?74065-2.0TDi-Lumpy-idle/page3&) and having been to audi, all they had to say was that they could not do anything for me without me pay £156 to put it on the computer. Nice! They then said if they did not find any fault code then they could not guarantee any fix, everything (including the costs) would be based on a 'best guess' scenario.
So I was hoping to see if you could help. I have a 2007 A6 20 tdi (140) that is lumpy/jerky between 1500 - 2000 rpm. I am based in Leeds LS28 and although this problem does not seem to causing any damage, I am bored of it now (and slightly embarrassed when I give people a lift).
Could you please let me know what you could do to help and the associated cost.
many thanks
Jamie
PS, apologies, but I could not PM this as I do not have a high enough post count.


If you wish to drive up to me I will have a look for you and I can now flash the ecu if required.

[razor37]

Hi I have just read the whole thread regarding lumpy idle. A very interesting read indeed. It seems a common problem as Ive found out. I have a 2005(Jan)Audi A4 3.0 tdi quattro avant with a rough idle problem. Mine seems different though. The car drives clean and smooth with no lack of power. When I pull up to a junction or to stop the engine idles rough for about 10 sec possibly less. Its like its going to cut out but does not. it then runs fine. It does not do this if I start the engine and leave it only when pulling up. Also the car now developed a shudder under braking. New Front disc's and pads in January this year. I dont drive the car hard or brake hard at all. Any ideas. There is a company called Star Performance near me who specialize in tuning Audi's so will be putting into them in January. Service Due. Wanted to know your thoughts on the 3.0 tdi problems. Are they the same as 2.0 tdi. Thanks

[covbod]

ta for info have a 2007 2.0 TDI (170) s line avant 115000 o clock runs like a dream except for the lumpy tick over... frigtned me at first because it sounds pretty lumpy!!!! same as everyone else then just ignore it and put it down to a quirk of the model. interested if anyone resolves!! ta bud

[tuffguy]

Hi A8 Tech,

I am very impressed with the responses you are giving these guys and I'm hoping that you can give me some advice.
I have an A4 2.0TDI (140) BRE engine in a 2006 B7. I am also encountering the hesitance between 1500 - 2200 RPM.
I get this symptom on standard and with a Superchips remap. On the remap, the hesitance is more noticeable and is
accompanied by a dash light for the EGR and black smoke from the exhaust. I have replaced numerous items, including
EGR valve, MAF sensor and have performed extensive checks for split hoses, etc.

I read with great interest about s/w updates and wondered if this would address the hesitance problem at low revs.

My currents software details pulled off VCDS are below:

S/W: 03G906016JD
S/W version: 8245
H/W: 0281012654
H/W version: H02

I'm based in Manchester and I'm ready to do anything to resolve this issue, after having spent around a year guessing and throwing money at it!!

Any advice/help at all would be much appreciated :-)

[a8 tech]

latest sw version for your ecu is 9905

[tuffguy]

thanks a lot, A8 Tech.

would you happen to know if audi would charge for a s/w update, if the car is out of warranty?

best regards,
dave

[a8 tech]

possible goodwill if you had the last service or take your next service with a dealer the new extended goodwill could be applied

[tuffguy]

hmmm, are you able to flash s/w updates onto the ecu, a8 tech? if so, how much do you charge and where are you based?

[GWilliamson]

Hi all.

How can I find out the software version I have please?
I too have a lumpy tick over on occasions plus a missing/stuttering problem at around 1800 rpm. Everything else runs fine up I'm a little worried something is about the fail!

Many thanks Gareth

[a8 tech]

hmmm, are you able to flash s/w updates onto the ecu, a8 tech? if so, how much do you charge and where are you based?

Yes I can flash update the ecu


Sent from my iPhone using
My fat fingers

[chrisd1983]

Hi Guys,

After spending alot on my car this past few weeks at a certain garage, I have lost my faith with them.....They have told 2 of the injectors are goosed and probably will need replacing soon.

Question I have a got is how easy is it to refurb them and what is normal process for doing this? My injectors are out of an 05 Audi A4 BLB engine code.

The car is still having a stutter at around 1500 - 2500 rpm intermiently, almost like a tiny boost leak and sometimes it doesnt crank too well first thing in the morning.....

I have a had new head / head gasket / glow plugs / glow plug loom and egr valve checked, so its sort of ruled out any of these being the fault.

Thanks,

Chris

[irishejit]

MAF sensor......I have had to replace this twice on my car

[mm707]

Hi all.

How can I find out the software version I have please?
I too have a lumpy tick over on occasions plus a missing/stuttering problem at around 1800 rpm. Everything else runs fine up I'm a little worried something is about the fail!

Many thanks Gareth

Replacing the vacuum unit on the inlet manifold cured this for me. When I opened up the old one it had a split diaphragm. While the manifold is off you can clean all the crud from the flaps and the egr too.

About £20 inc all gasgets and quite an easy job

[audi@37]

If you wish to drive up to me I will have a look for you and I can now flash the ecu if required.

a8 tech.i live near you and need your help asap.can you get back to me soon please.thank you.audi@37.