2.0TFSI Accelerating Judder - Audi A5 Forum & Audi S5 Forum
 
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post #1 of 12 Old 12th January 2017, 08:25 AM Thread Starter
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2.0TFSI Accelerating Judder

Looking for some advice on a current issue I am having with a 2010 Audi A5 2.0TFSI.

When accelerating the car judders quite badly regardless of which gear I am in.
If I keep my foot down while it is juddering the Emissions Control System light flashes for about 10 seconds. There is no change in the way it drives when this is happening.

I have taken it to Audi under the 1 year approved warranty and they diagnosed it to be due to a build up of carbon in the inlet manifold.
Valves and inlet manifold have been completely cleaned by a local Audi Specialist but it is still juddering.

It also does not matter if the engine is cold or warm.

Just hoping to get some advice on what else it could be and if anyone else has experienced this same issue.
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post #2 of 12 Old 23rd January 2017, 06:48 AM
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Hi Jiten91, I have been having a similar issue with my 09 A5 2.0TSFI. My car shutters mostly when idling.

The engine management light came on on Friday and I brought it to my Indie who put the Snap On computer on it.

One of the faults was a manifold flap sticking, which may have been caused due to the issue and/or repair from the oil consumption issue I had resolved mid-2016. I have the car booked in with Audi Belfast in 2 days time to look at the manifold flap fault, a seeming loss of power (as if the turbo doesn't kick in) and the shutter you talk about. I'll let you know if anything comes from Wednesday.
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post #3 of 12 Old 26th January 2017, 03:18 AM Thread Starter
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Hi Aslan09_2,

I have managed to run a diagnostic fault code read while driving and when the light started flashing. It came up with a misfire on Cylinder 3.

The car has been booked in anyway to Coventry Audi and will let them know of my findings so they should be able to go from there and sort it out.

Thank you for your reply,
Much appreciated.
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post #4 of 12 Old 5th February 2017, 03:35 PM
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Did either of you find a resolve to this?
My 2010 2.0 TFSI has exact same issue.
I had the engine rebuild by Audi to fix oil burning in 2016 too. The problem started after the rebuild. My first thoughts were fuel starvation or turbo, would be interested in knowing the root cause?
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post #5 of 12 Old 5th February 2017, 04:00 PM
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Just notice this today on my 2017 A4 loaner.


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post #6 of 12 Old 5th February 2017, 08:22 PM
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Sorry you all are going thru these issues. I can only add that I had a nearly identical issue with the PCV being clogged. Again carbon/oil related to a degree. I hope your issues id something this easy....I hope.

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post #7 of 12 Old 5th February 2017, 08:24 PM
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Think what I was experiencing with the A4 is a new feature where at a stop the cars engine shuts down to save gas. Was very clunky coming back tho.


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post #8 of 12 Old 6th February 2017, 12:13 AM
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Update on my issue

I took my car to Audi on 25/01/17 and they also did the diagnostics that my indie did the Saturday before.

They said they would have cleaned the intake manifold at the time of the piston ring repair when they were down that far had there been any issues (carbon can build up in them due to the oil burning issue). This was not mentioned at the time so I don't they actually did! At this stage (7 months later) they wouldn't break the engine down to clean the intake manifold and would replace it for me for 745. I argued that if they cleaned it at the time like they were supposed to do I wouldn't have had this issue. They argued that 7 months had passed and I should have come in earlier if I noticed a problem (the light only came on the week before so I don't know how I was supposed to know there was an issue - the car juddered while idling but not all the time, which I was assured by Audi Belfast was due to 'running in' time...) Anyway, the lady came back to me and said that under 'good will' they would reduce the price to 500+VAT...

I retuned to my indie and he was able to do the work for slightly less so I gave him the business instead. The part itself was 346+VAT!! Got the car back yesterday and it drives like a dream - not a shake out of it and the apparent turbo lag is gone. Maybe I've finally got the car I bought now! Typical that my final payment on it was this month too Hopefully that's it sorted for another while! Fingers crossed!
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post #9 of 12 Old 23rd March 2017, 05:58 AM Thread Starter
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Hi All,

My issue has now been sorted. Coventry Audi diagnosed it to be mis-firing due to a faulty coil pack on Cylinder 3. They replaced this mid February under warranty and it drove perfectly.

However, last weekend, engine started sputtering when pulling away from the lights. Really bad this time. Had to pull over and call a mate to bring a diagnostic tool. This time it was a Misfire on Cylinder 2. Couldn't be bothered to wait couple of weeks for it to be taken back into Audi. Next morning, picked up 4 new Coil Packs and 4 new spark plugs and replaced. Cleared the code and running perfectly now.

At least if it happens again now, I know it won't be those parts.

Hope this helps anyone else with similar issues.
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post #10 of 12 Old 23rd March 2017, 06:55 AM
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Smile Just wondering.....lets ask Cuppa....

Quote:
Originally Posted by aslan09_2 View Post
Update on my issue

I took my car to Audi on 25/01/17 and they also did the diagnostics that my indie did the Saturday before.

They said they would have cleaned the intake manifold at the time of the piston ring repair when they were down that far had there been any issues (carbon can build up in them due to the oil burning issue). This was not mentioned at the time so I don't they actually did! At this stage (7 months later) they wouldn't break the engine down to clean the intake manifold and would replace it for me for 745. I argued that if they cleaned it at the time like they were supposed to do I wouldn't have had this issue. They argued that 7 months had passed and I should have come in earlier if I noticed a problem (the light only came on the week before so I don't know how I was supposed to know there was an issue - the car juddered while idling but not all the time, which I was assured by Audi Belfast was due to 'running in' time...) Anyway, the lady came back to me and said that under 'good will' they would reduce the price to 500+VAT...

I retuned to my indie and he was able to do the work for slightly less so I gave him the business instead. The part itself was 346+VAT!! Got the car back yesterday and it drives like a dream - not a shake out of it and the apparent turbo lag is gone. Maybe I've finally got the car I bought now! Typical that my final payment on it was this month too Hopefully that's it sorted for another while! Fingers crossed!
Would this problem have be sorted if you had taken the car for an engine Carbon Clean I wonder????????????? Cuppa PLEASE tell us cos I know that you are the expert, thanks!!!


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post #11 of 12 Old 20th April 2017, 02:17 PM
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Talking Solved

Hi all, struggling to reset my password, reset password link not working.
It's Ewan who's had this problem and now resolved.

I did a few things:
1. Halfords version of RedEx in the tank.
This fixed the judder but replaced it with a new problem. At the same point it would normally judder/kangaroo hop, the engine spluttered and the Engine Management light came on each time it happened.
2. The misfire got worse and EPS light came on.
3. I took it to a VW/Audi specialist who diagnosed the issue with their VAS health-check machine.
A misfire in 1 cylinder.

Replaced all spark plugs and coil packs (250). Sorted.

No more juddering or kangaroo hopping and I've done over 1000 miles since.

The VW/Audi specialist who fixed it was: Autotechnik Motor Engineers | West Midlands no.1 leading premier independent Volkswagen, Audi, Seat and Skoda specialist
Based in Halesowen near Birmingham- great work guys. I thoroughly recommend you use them if you live in the West Midlands.
250 to fix what I thought would be closer to 1k.
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post #12 of 12 Old 21st April 2017, 01:54 AM
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Can't believe a dealer would say the acceleration judder is carbon build up!!! This is why I still prefer to DIY, I know it's been done properly!!

This is very basic mechanics, when the engine is under load, eg accelerating, this puts 'load' on the plugs and coil packs and if they are weak, they will cause a miss fire or an intermittent jolt depending on the severity of the dodgy part.

To be honest, without opening up the intake before and after a carbon clean, I'm doubtful as to how much it 'works'. I have had mine carbon cleaned and at first, I think it felt slightly more responsive, but really didn't notice much improvement in response or mpg. If you do a lot of short journies, use cheap fuel, it may benefit you. I always use Shell nitro V Power diesel and service before required, mine feels lively and returns a good mpg. Ooh and also have a little blast every now and then! DPF seems happy too doing a regen every 300ish miles which is the norm. I only do urban driving to and from work so rarely go on dual carriageways or motorways.
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