4.2 VAGCOM Logging Instructions & Database

DIY/TECH/INFORMATIVE
#1

So plenty of people here use vagcom to run logs of their cars. You can glean a substantial amount of diagnostic and performance measurement information from VAGCOM logs. Countvohn came up with a standard logging format years ago that many of us use for a baseline (the 003/020/021 log). Below is a pictorial guideline for taking these logs for anyone who is interested.

Once you have the log completed per the instructions, feel free to post it up either just the .csv file or the values directly (copy the values from excel and paste it right into the post, it’ll be pasted as tab delimited which is easy to import back into excel). Either myself or a few of the other guys here will be able to give feedback on the performance of the car and recommend additional logs or corrective actions if need be.

Depending on the response and activity I’ll look into options for database the information.

INSTRUCTIONS
One change would be to hit the “Turbo!” button between steps 5 & 6, this speeds up the sample rate.

You’ll want to run the log on a flat road in 3rd gear from 1500rpm - 7100rpm, full throttle the whole way. A few samples is best (1 going one direction, another going the opposite direction on the same road is ideal).

Take note of the current weather (temperature, humidity, air pressure). Additionally note your mods.


http://img838.imageshack.us/img838/3585/hqrq.jpg

#2

Very nice!!!

#3

Thank You I needed that. I can’t wait to do this, I’ve never logged anything before but wanted to learn how.

#4

happy to help, feel free to ask any questions

#5

question: is it possible to creat a macro in excel (or something…may have the wrong lingo) that automatically imports our data and outputs a graphical representation of it? Not sure what would be most important to review. Could graph RPM/sec and timing pulled etc.

#6

yes, vba is more than capable of importing data and making a report. I’ve got some time in on something to do exactly that, just haven’t had the time or patience to finish it up. I’ll see if I can finish it tonight after I finish up cooking.

#7

I’ve always wondered how to do this, will give it a try and post up. Is there anything different I need to do for a b8.5 ?

#8

I’ve always wondered how to do this, will give it a try and post up. Is there anything different I need to do for a b8.5 ?

#9

the measuring blocks will be different on the 3.0T. contact primetime (he’s on here), he should be able to give you more insight

#10

the measuring blocks will be different on the 3.0T. contact primetime (he’s on here), he should be able to give you more insight

#11

Sorry to link AZ, here’s what you’re looking for, from an old post of mine.

http://www.audizine.com/forum/showthread.php/474796-B8-S4-log-thread-Post-your-VCDS-logs-here

#12

Sorry to link AZ, here’s what you’re looking for, from an old post of mine.

http://www.audizine.com/forum/showthread.php/474796-B8-S4-log-thread-Post-your-VCDS-logs-here

#13

<3

#14

<3

#15

May as well copy that thread over here…seems like the only guys who might log their car are going to post here anyway. That thread you started is EXCELLENT, and it has 16 posts in 2 years, 10 of which are from you. That’s sad.

The last post was from SkidRowe, a member here, and it was from 18 months ago.

#16

^^ Agreed. I used that thread when I logged my car at the track. Very helpful.

#17

May as well copy that thread over here…seems like the only guys who might log their car are going to post here anyway. That thread you started is EXCELLENT, and it has 16 posts in 2 years, 10 of which are from you. That’s sad.

The last post was from SkidRowe, a member here, and it was from 18 months ago.

#18

^^ Agreed. I used that thread when I logged my car at the track. Very helpful.

#19

Sure. Here’s a repost from my AZ thread. Some of the block numbers changed, feel free to change them.

[QUOTE=ilspazzaneve;7362756]Here’s what to log, to start. Go to the ENGINE controller, then hit ADVANCED MEAS VALUES:

http://www.ross-tech.com/vcds/tour/screenshots/open-screen.png

http://www.ross-tech.com/vcds/tour/screenshots/adv-meas-01.png

You’ll only be able to log 8 or so blocks at a time, any more and it won’t read. Note some of the block #s are different on different cars, but it’ll be close, just match the descriptor instead. Don’t forget to hit TURBO and GROUP UDS REQUESTS to speed up the sampling time.

Pick your blocks like below, then hit LOG, then START. Your log is a *.csv file, saved where you specified.

I’ll usually do a run like this at the beginning to get the ambient conditions and check to make sure everything is OK.

Group 10 - Field 0 Outside air temperature
Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 39 - Field 0 Ambient air pressure
Group 345 - Field 0 Air mass
Group 352 - Field 0 Intake manifold pressure
Group 538 - Field 0 Cat. temperature; bank 1
Group 544 - Field 0 TI_1_HOM[0] (this is cylinder 0 injection time)
Group 556 - Field 0 Intake air temperature
Group 566 - Field 0 Throttle valve angle (don’t be surprised if it only opens 80 degrees, that is normal)

Here’s a knock log with all cylinders (the individual cylinders show how much timing is being pulled per cylinder due to knock)

Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 216 - Field 0 IGA_AD_1_KNK[0]
Group 217 - Field 0 IGA_AD_1_KNK[1]
Group 218 - Field 0 IGA_AD_1_KNK[2]
Group 219 - Field 0 IGA_AD_1_KNK[3]
Group 220 - Field 0 IGA_AD_1_KNK[4]
Group 221 - Field 0 IGA_AD_1_KNK[5]
Group 222 - Field 0 Ignition angle; actual
Group 623 - Field 0 Charge air pressure specified value

Here’s one which I use to gauge performance

Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 216 - Field 0 IGA_AD_1_KNK[0]
Group 222 - Field 0 Ignition angle; actual
Group 233 - Field 0 Lambda probes actual; bank1
Group 345 - Field 0 Air mass
Group 352 - Field 0 Intake manifold pressure
Group 556 - Field 0 Intake air temperature
Group 623 - Field 0 Charge air pressure specified value
Group 625 - Field 0 RFP_AV

What to log:
Usually the best logs are long pulls in 3rd or 4th from a nice low RPM, say 2500 or lower, up to redline.
Some 1/4 mile logs are fun too, from a dig.
Start your log about 10 seconds before your running, at least, since you may find on a slow PC the log file starts a bit late.

The *.csv file
Try to limit your logs to the runs themselves, it’s a pain in the ass to wade through 9000 rows to look for the pulls. If you have 20 mins of logs, please try to edit it such that there are a few rows before, and a few runs after the pulls, but leave the headers on the rows.

For those with DSG
For those with an S-tronic tranny, get used to not activating the kickdown switch, or else the tranny will downshift and you won’t have a full pass in that gear. By “almost” flooring the accelerator pedal (you can actually feel the stiffness of the kickdown switch at this point), you’ll still get full throttle, but stay in the gear you wanted. You can check this with VCDS, the throttle will open to 85%/80degrees (this is full open, don’t worry).

Posting:

If you use gmail, that makes life a whole lot easier. Import your *.csv file to Google Docs as a spreadsheet. When you open the spreadsheet, go to the top, hit “file”, “Publish”, and copy the spreadsheet link and post it here. Easy!
[/quote]

#20

Sure. Here’s a repost from my AZ thread. Some of the block numbers changed, feel free to change them.

[QUOTE=ilspazzaneve;7362756]Here’s what to log, to start. Go to the ENGINE controller, then hit ADVANCED MEAS VALUES:

http://www.ross-tech.com/vcds/tour/screenshots/open-screen.png

http://www.ross-tech.com/vcds/tour/screenshots/adv-meas-01.png

You’ll only be able to log 8 or so blocks at a time, any more and it won’t read. Note some of the block #s are different on different cars, but it’ll be close, just match the descriptor instead. Don’t forget to hit TURBO and GROUP UDS REQUESTS to speed up the sampling time.

Pick your blocks like below, then hit LOG, then START. Your log is a *.csv file, saved where you specified.

I’ll usually do a run like this at the beginning to get the ambient conditions and check to make sure everything is OK.

Group 10 - Field 0 Outside air temperature
Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 39 - Field 0 Ambient air pressure
Group 345 - Field 0 Air mass
Group 352 - Field 0 Intake manifold pressure
Group 538 - Field 0 Cat. temperature; bank 1
Group 544 - Field 0 TI_1_HOM[0] (this is cylinder 0 injection time)
Group 556 - Field 0 Intake air temperature
Group 566 - Field 0 Throttle valve angle (don’t be surprised if it only opens 80 degrees, that is normal)

Here’s a knock log with all cylinders (the individual cylinders show how much timing is being pulled per cylinder due to knock)

Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 216 - Field 0 IGA_AD_1_KNK[0]
Group 217 - Field 0 IGA_AD_1_KNK[1]
Group 218 - Field 0 IGA_AD_1_KNK[2]
Group 219 - Field 0 IGA_AD_1_KNK[3]
Group 220 - Field 0 IGA_AD_1_KNK[4]
Group 221 - Field 0 IGA_AD_1_KNK[5]
Group 222 - Field 0 Ignition angle; actual
Group 623 - Field 0 Charge air pressure specified value

Here’s one which I use to gauge performance

Group 15 - Field 0 Vehicle speed
Group 25 - Field 0 Engine speed
Group 216 - Field 0 IGA_AD_1_KNK[0]
Group 222 - Field 0 Ignition angle; actual
Group 233 - Field 0 Lambda probes actual; bank1
Group 345 - Field 0 Air mass
Group 352 - Field 0 Intake manifold pressure
Group 556 - Field 0 Intake air temperature
Group 623 - Field 0 Charge air pressure specified value
Group 625 - Field 0 RFP_AV

What to log:
Usually the best logs are long pulls in 3rd or 4th from a nice low RPM, say 2500 or lower, up to redline.
Some 1/4 mile logs are fun too, from a dig.
Start your log about 10 seconds before your running, at least, since you may find on a slow PC the log file starts a bit late.

The *.csv file
Try to limit your logs to the runs themselves, it’s a pain in the ass to wade through 9000 rows to look for the pulls. If you have 20 mins of logs, please try to edit it such that there are a few rows before, and a few runs after the pulls, but leave the headers on the rows.

For those with DSG
For those with an S-tronic tranny, get used to not activating the kickdown switch, or else the tranny will downshift and you won’t have a full pass in that gear. By “almost” flooring the accelerator pedal (you can actually feel the stiffness of the kickdown switch at this point), you’ll still get full throttle, but stay in the gear you wanted. You can check this with VCDS, the throttle will open to 85%/80degrees (this is full open, don’t worry).

Posting:

If you use gmail, that makes life a whole lot easier. Import your *.csv file to Google Docs as a spreadsheet. When you open the spreadsheet, go to the top, hit “file”, “Publish”, and copy the spreadsheet link and post it here. Easy!
[/quote]