APR - VCDS Datalogging Guide

A. Vehicle Setup

  • Air-conditioning OFF
  • Traction control OFF
  • Windows UP
  • Note: If the car was using another octane of fuel (other than the octane to be tested) right before the testing is set to begin...Run the car until very near empty (5 miles or less until empty on trip computer to rid the fuel system of the previous octane of fuel. Then fill the car with 91 octane and drive the car for about 15 miles to rid the car of the last remnants of the previous octane. Only after this can testing begin.

B. RUN TYPE / DRIVING TECHNIQUE

Runs need to be at Wide-Open Throttle, 4th Gear, from 1500 rpm rolling start to redline (fuel shutoff).
Note: if too much speed in 4th gear is an issue, 3rd gear can be used but all runs need to be in the same gear at Wide-Open Throttle for the entire run between 1500 rpm and fuel shutoff.

C. NUMBER OF RUNS NEEDED

Minimum of 4 runs for the Vag-Com items I outlined below...one for each logging "round" as shown below in section "VAG-COM BLOCKS TO LOG".
Note: all runs should be done on the same stretch of road; the engine should be up to full operating temperature before logging; the cool down time needed between runs will be handled when the customer turns around to reposition himself for next run on the original stretch of road used for the first run.

D. VAG-COM / COMPUTER SETUP:

  • The data should be logged using Advanced Measuring Blocks in the Engine Controller
  • The "Turbo" mode should be activated to ensure a decent data sampling rate
  • The data returned to APR should be in raw numerical form (not graphs). Vag-Com will export the data in a .csv format. This is what we need. Please have them title each file like "2006_B7_K04_91_oct_4thgear-wot_run1", "2006_B7_K04_91_oct_4thgear-wot_run2" and so forth.
  • Note: If you data sample rate is low, expecially if you have no Turbo Mode option with the Micro Can cable, return to the home screen, click Options and change BLK INT to 25 and CHAR INT to 0.

Vag-Com Screen Shots

Main Screen Engine Controller
Common Controllers Advanced Measuring

E. VAG-COM BLOCKS TO LOG:

Turbocharged Vehicles (2.0T FSI / 2.0TFSI / 2.0 TSI)

ROUND 1 LOGGING:
Use for Boost and Fueling
Diagnosis
Item # Vag-Com
Block #
Description
*Not Applicable to EA888 TSI/TFSI Engines.
1001-1Engine Speed
2014-3Misfire Sum
3031-1Lambda, Current Value
4054-3Accelerator Pedal Position
5054-4Throttle Plate Angle
6101-3Injection Timing (Median)
7*103-1*Current Fuel Pressure*
8114-4N75 Duty Cycle
9115-3Boost Pressure (Specified)
10115-4Boost Pressure (Actual)
11230-1Rail Pressure - Specified
12230-2Rail Pressure - Actual
ROUND 2 LOGGING:
Use for Boost and Timing
Diagnosis
Item # Vag-Com
Block #
Description
1001-1Engine Speed
2003-4ignition Timing
3020-1Cylinder Ignition Angle Delay (cyl 1)
4020-2Cylinder Ignition Angle Delay (cyl 2)
5020-3Cylinder Ignition Angle Delay (cyl 3)
6020-4Cylinder Ignition Angle Delay (cyl 4)
7031-1Lambda, Current Value
8054-3Accelerator Pedal Position
9101-3Injection Timing (Median)
10114-3Engine Load (actual)
11115-4Boost Pressure (Actual)
12230-2Rail Pressure - Actual
ROUND 3 LOGGING:
MAF/Load-Specific Diagnosis
Item # Vag-Com
Block #
Description
*Not Applicable to EA888 TSI/TFSI Engines.
1001-1Engine Speed
2003-2Intake Air Mass
3031-1Lambda, Current Value
4054-3Accelerator Pedal Position
5054-4Throttle Plate Angle
6101-3Injection Timing (Median)
7*103-1*Current Fuel Pressure*
8114-1Engine Load (specified)
9114-3Engine Load (actual)
10115-3Boost Pressure (Specified)
11115-4Boost Pressure (Actual)
12230-2Rail Pressure - Actual
ROUND 4 LOGGING:
Misfire-Specific Diagnosis
Item # Vag-Com
Block #
Description
1001-1Engine Speed
2003-2Intake Air Mass
3015-1Misfire Cyl 1
4015-2Misfire Cyl 2
5015-3Misfire Cyl 3
6016-1Misfire Cyl 4
7054-3Accelerator Pedal Position
8054-4Throttle Plate Angle
9101-3Injection Timing (Median)
10115-3Boost Pressure (Specified)
11115-4Boost Pressure (Actual)
12230-2Rail Pressure - Actual
ROUND 5 LOGGING:
Use for Boost and Timing
Item # Vag-Com
Block #
Description
1003-1Engine Speed
2003-2Intake Air Mass
3003-3Throttle Angle
3003-4Ignition Timing
4020-1Cylinder Ignition Angle Delay (cyl 1)
5020-2Cylinder Ignition Angle Delay (cyl 2)
6020-3Cylinder Ignition Angle Delay (cyl 3)
7020-4Cylinder Ignition Angle Delay (cyl 4)
8031-1Lambda, Current Value
10114-4N75 Duty Cycle
11115-3Boost Pressure (Specified)
12115-4Boost Pressure (Actual)

Supercharged Vehicles (3.0 TFSI)

General Logging Blocks:
Use blocks from the list below as instructed
Item # VCDS
Block #
Description Typical Stock Reported Value
Values Depend on Engine Load,
Ambient Conditions and other Variables.
Typical Stage I Reported Value
Depend on Engine Load,
Ambient Conditions and other Variables.
122 Throttle Position    
2 24 Accelerator Position    
3 33 Long Term Fuel Trim Bank 1    
4 34 Long Term Fuel Trim Bank 2    
5 35 Engine Speed Redline = 7,200 RPM Redline = 7,200 RPM
6 128 Ambient Pressure    
7 292 Timing Retard Cyl 1    
8 293 Timing Retard Cyl 2    
9 294 Timing Retard Cyl 3    
10 295 Timing Retard Cyl 4    
11 296 Timing Retard Cyl 5    
12 297 Timing Retard Cyl 6    
13 298 Ignition Angle    
14 421 Mass Air Flow Peak = 920kg/h (Will Vary +/- 20) Peak = 1160kg/h (Will Vary +/- 20)
15 436 Boost Pressure (absolute) Peak = .8bar
Redline = .5bar
Peak = .86bar
Redline = .86bar
16 632 Intake Air Temperature    
17 702 Boost Control Valve Angle Begins to Open at 3,500 RPM
Redline = 28%.
0%

Naturally Aspirated Vehicles (2.5L, 3.2L)

ROUND 1 LOGGING:
GENERAL
Item # Vag-Com
Block #
Description
1001-1Engine Speed
2001-2Coolant Temp
3003-2Intake Air Mass
4003-4Ignition Timing
5011-3Intake Air Temp
6031-1Lambda, Current Value
7031-2Lambda, Specified Value
8054-3Accelerator Pedal Position
9054-4Throttle Plate Angle
10101-3Injection Timing (Median)
11114-1Engine Load (specified)
12114-3Engine Load (actual)
ROUND 2 LOGGING:
DETAILED TIMING
Item # Vag-Com
Block #
Description
1001-1Engine Speed
2003-4Ignition Timing
3020-1Cylinder Ignition Angle Delay (cyl 1)
4020-2Cylinder Ignition Angle Delay (cyl 2)
5020-3Cylinder Ignition Angle Delay (cyl 3)
6020-4Cylinder Ignition Angle Delay (cyl 4)
7031-1Lambda, Current Value
8031-2Lambda, Specified Value
9054-3Accelerator Pedal Position
10112-4Median Exhaust Temp
11114-1Engine Load (specified)
12114-3Engine Load (actual)

APR Tuned

Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: (334) 502-5180 Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

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