allenst

The engine management doesn't adapt to your style of driving instead it compensates for any engine wear or dirt build up etc etc

The idle problem occurs when the battery is changed because when the battery is disconnected the ecu forgets any unique settings it has in its memory for your engine wear etc

The build up of gunge in the throttle body means that the butterfly position changes over a period of time. The ecu knows this and compensates electronically.

When the ecu is wiped (when the battery is disconnected) it only knows its default settings so it thinks that the throttle butterfly is not fully closed and tries to close it by adjusting the stepper motor on the throttle . When it cant do this you get a viscous circle where the ecu is trying to shut off the throttle but the gunk under the throttle butterfly wont let it .....hence the hunting idle. This can be fixed by an Audi tech by resetting the throttle idle position in the ecu

clean and recode

gk1

I'm not sure if this is the thread you meant to post in...but...no. Anything required to be stored would be in non-volatile memory. Your statement implies the odometer would reset to zero when disconnecting the battery...which we all know does not. Also one of the few benefits of FSI is the lack of gunk on the throttle butterfly. I've had 75k miles on mine and the throttle butterfly looked brand new on both sides. Only way to muck it up would be if you installed an over oiled aftermarket air filter.

MalibuCANE

I finally found a place to fix my Lag problem on my 2014 S6. Carmax. It is disappointing that such a great car is plagued with this issue and more so that Audi wouldn't do anything to fix it on my 2014 model after many attempts. Overall I loved the car and will miss it but I couldn't stand the frustration and didn't want to be stuck with the car long term.

subterFUSE

Get a replacement yet?

Nashtyboy

I got this installed and it fixed it: TSB 2035235/2 - ECU update

Didn't do the TCM update.

If you're not sure if you still have the lag or not, the easiest way to reproduce it is to find a free-flowing right turn... slowing to normal right-turn speed and then hitting the accelerator created the most noticeable lag for me... on the order of a good second and a half before the engine woke up.

ben_aip

What model year is yours if I may ask? Seems they're not doing any ECU updates for MY2014 and MY2015 S6/S7. saying it's not applicable. They've only done one that they said applies to my 2014 S7 - the TCM one. And if yours is a MY2014/15, what did you have to say to them just so that they'll update the ECM for you.

uttevrec

How do you tell which version of software you have using VCDS? Is it at the end of the component field for the Engine and Transmission controllers? If so, I have the original software for both:

• Engine: Component: 4.0l V8TFSI / H62 0006
• Transmission: Component: 0B5 40TFSINAR H01 0009

Time for a dealer visit.

ke116ngc

Correct. Your bold items are the version numbers.

subterFUSE

Finally did an AutoScan after getting the updates, just to confirm I have them:


ECU

Previously on 0006

Now
Component: 4.0l V8TFSI / H62 0007


TCU

Previously 0009

Now
Component: 0B5 40TFSINAR H01 0013



Car does feel more responsive, but I still need to take it to a certain road where I know I could always get the lag previously. Then I'll be able to confirm or deny for certain.

ronbars

Looking very forward to these updates at my 25k service. My ECU software is comparatively ancient:

Component: 4.0l V8TFSI / H62 0002