So just curious, my Ross-Tech cable is arriving tomorrow and I already have to app on my computer ready, but the guy at the shop last time was just breezing through windows last time I was at the shop and I have no idea what to really do. I know to open the engine section and I am sure I can find the button to watch the sensor outputs but what are all the sensors under? Aren’t they different blocks like 01, 02, 03, ect? Is there a list of all the blocks or whatnot and what they do?
Read, read, read on the Ross-Tech Wiki. Everything you need to know is there.
There are also you-tube videos that you can view detailing each step, as well as step-wise instructions here and on other forums.
It is a fun tool, you will enjoy the new connectivity with your car. 
Some of the wiki makes sense and other parts dont or seem like there only telling half the story. Maybe it will be more clear when I have the computer in my lap.
There are a couple of good DIYs out there for the basic coding stuff that everyone likes to do. Just use your google.
Ross Tech’s website is a bit weird.
As for engine logging, what are you trying to log?
My favorite is this. Its kind of an easter egg.
Here is how to get to it.
Its a button that says Acceleration above and to the right of the log blocks.
When You click it the picture you see below will pop up over the log blocks.
http://www.ross-tech.com/vag-com/tour/m-blocks.html
http://i1108.photobucket.com/albums/h411/halo549b/ROSS_TECH/acceleration1__zps9eafc3ac.jpg
Enjoy…
Well I was trying to log all 6 cylinders missfire counters but it seems to turn off missfire recognition while driving. When I watch the counters while idling after 5 minutes cyl 1 has missfired 4-5 times and 2 or 3 has missfired once. I am trying to figure out if I should move coils and see if it follows or what? I also see that Bank 2 lambda is like -10% and bank one is 0%. I get a random intermittent missfire, once every week or two while driving the car suddenly starts to missfire randomly. at first its one cylinder then more because I loose power and have to pull over. So I am trying to figure out whats bad and causing an intermittent issue because nobody seems to know.
This probably won’t make sense but this was a problem and now the problem is gone.
After I purchased my car and had its first emissions test pass.
I started having these CEL codes.
16805 - Warm Up Catalyst; Bank 1: Efficiency Below Threshold
P0421 - 001 - Upper Limit Exceeded - MIL ON
16815 - Warm Up Catalyst; Bank 2: Efficiency Below Threshold
P0431 - 001 - Upper Limit Exceeded - MIL ON
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded - Intermittent
16688 - Cylinder 4: Misfire Detected
P0304 - 001 - Upper Limit Exceeded - Intermittent
16689 - Cylinder 5: Misfire Detected
P0305 - 008 - Implausible Signal - Intermittent
So I purchased aftermarket catalytic converters. Wasn’t paying AUDI’s $899. each price.
CEL codes went away for almost exactly 1 year then the Efficiency Below Threshold for bank 1 and 2 came back. And random misfires.
Audi gave me the coil pack recall letter so I went and they gave me 6 new coil packs.
Still got all the above CEL codes.
So I had the catalytic converters replaced under warranty.
Immediately after replacing the catalytic converters I got 3 new CEL codes.
Those 3 CEL codes identified three out of four 02 sensors as being bad.
So if I was going to replace three 02 sensors I decided to replace all four.
After replacing all four 02 sensors I got the CEL codes telling me that the catalytic converters were bad again.
But so far NO random misfires after 2 years.
The almost $500. for the 02 sensors got me a two year extension.
So I paid JHM for the ECU tune.
Now NO CEL codes and NO random misfires yet.
In February I am getting the JHM downpipes with no catalytic converters.
With emissions testing about 4 months after.
Wish me luck on the emissions testing. JHM ECU tune in place I don’t think I’ll need it.
I am not exactly sure why 02 sensors play a big factor in random misfires.
But that should be left for another thread?
Well this is interesteing. I am getting some weird readings. I get 16815/P0431/001073 - Warm Up Catalyst; Bank 2: Efficiency Below Threshold every few days. So recently I checked and pulled the OBDII Freeze Frame and got this;
Thursday,19,December,2013,17:23:53:11215
VCDS – Windows Based VAG/VAS Emulator
VCDS Version: Release 12.12.0 (x64)
Data version: 20130910
Address 08: Auto HVAC Labels: 8E0-820-043.lbl
Control Module Part Number: 8E0 820 043 L
Component and/or Version: A4 Klimaautomat 1116
Software Coding: 00000
Work Shop Code: WSC 63351
VCID: 2A550814D6D4E64EEA7-5178
2 Faults Found:
01842 - Potentiometer/Actuator for Temperature Flap; Right (G221)
09-00 - Adaptation Limit Surpassed
00604 - Potentiometer Positioning Motor for Air Flow Flap (G113)
30-10 - Open or Short to Plus - Intermittent
Thursday,19,December,2013,18:06:46:11215
VCDS – Windows Based VAG/VAS Emulator
VCDS Version: Release 12.12.0 (x64)
Data version: 20130910
Address 01: Engine (8E0 909 559 E)
18:06:42
2 Misfire (total)
2 Misfire Counter Cylinder 1
0 Misfire Counter Cylinder 2
0 Misfire Counter Cylinder 3
0 Misfire Counter Cylinder 4
0 Misfire Counter Cylinder 5
0 Misfire Counter Cylinder 6
-1.6 % Lambda Control Bank 1 Sensor 1
-3.9 % Lambda Control Bank 2 Sensor 1
Tuesday,24,December,2013,15:05:58:11215
VCDS – Windows Based VAG/VAS Emulator
VCDS Version: Release 12.12.0 (x64)
Data version: 20130910
Freeze Frame Data for address 10
PID02 DTC that caused freeze frame data storage: P0431
PID03 Fuel system 1/2 status: Closed loop, using O2 sensors
… Closed loop, using O2 sensors
PID04 Calculated load value: 46.7 %
PID05 Engine coolant temperature: 99 °C
PID06 Short Term Trim - Bank 1: 2.3 %
PID07 Long Term Trim - Bank 1: 4.7 %
PID08 Short Term Trim - Bank 2: 2.3 %
PID09 Long Term Trim - Bank 2: 0.8 %
PID12 Engine RPM: 2560 /min
PID13 Vehicle speed: 98 km/h
Now it says the code that caused the freeze frame is the Bank 2 cat, I have also noticed that the Bank 2 Lambda is reading -10% or so at idle, and I think one of the O2 sensors was reading out of tolerance even though the system said it passed the test. So could O2 sensors be a cause of my missfires? I was also talking at length with the owner of another Audi shop and described my missfire to him and the 2 other guys listening and they all kinda scratched their head, one guy said that he had a similar issue but his was always missfiring and he said to spray the engine with brake clean and if it revs higher it has a vac leak.