Revs bouncing/rough idle and fuel consumption

Hi, thought I'd start a new thread for the next issue with my Audi A6, 2007 2.0TDI Automatic BRE.

I've just recently had the engine and all sorts of other bits replaced (DMF, DPF, Cam belt, water pump, oil pump & balance shaft upgrade).

Car is running and driving pretty smooth, most of the time... But I still have a problem where the revs bounce up and down and the car shakes very noticeably when idling. I've noticed that when it does this, just sat still ticking over the MPG read out on the dash goes right down. I get this problem nearly every time the car comes to a halt.

A couple of times over the last few days whilst driving it seems that the car has been holding the revs up higher than is necessary, maybe +1600 rpm at 20-25mph.

Also, related to this; twice now it has "stalled"...? While I was stopped at a pedestrian crossing, the car was doing it's shaking and rev bouncing, and then just cut out!! I didn't think you could stall an automatic?! :)

Anyways, it's going into the Audi dealer soon for them to have a look. Anything to remediate the issue will be covered under my warranty, I'd just like to know the score before having the conversation. Anyone seen anything like this? Any ideas.

I'll include a video, you can see the revs bouncing, and if you crank up the volume you can actually hear it too. You can also see the MPG going down down dowwwwn :(

As always, any help and advice is welcome. Thanks.

Here's the video....

Audi A6 rough idle, revs bounce, MPG down, kangaroo. - YouTube

Does it happen only when gear is in D position? Is it same in P and N position? Maybe is automatic gearbox faulty...

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Have a look at your torsion value see what it is. adjust it a little either way a fraction see if that helps

Garage have said they think it's an injector problem. The injectors have all been taken out of the car and sent to a company for testing, they will replace any faulty injectors as well as fitting fresh injector seals and a new injector wiring loom... Means I'm without the car for another week, but hopefully that will sort it!

Injectors have all come back fine. Garage have replaced the injector seals and wiring. Ive been told that it's better than it was, but not quite right. So it was booked into Audi main dealer today, so waiting to see what the outcome of that will be.
I don't think it's transmission related, it's had a new flywheel and torque converter...
I've been told that if the Audi dealer give it the all clear, then there's not much else they can do!!

Hi have you ever found out what the problem was ? Have exactly the same problem but mine only when selecting D or R, and the car is really crazy acting when presing the gas pedal


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Audi a6 2008 2.0 RPM problem Help - YouTube


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