VAG-COM DIAGNOSTIC LOGGING FOR APR TUNED CARS
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.
Vag-Com Screen Shots
E. VAG-COM BLOCKS TO LOG:
Turbocharged Vehicles
| Item # | Vag-Com Block # | Description |
|---|---|---|
| 1 | 001-1 | Engine Speed |
| 2 | 054-3 | Accelerator Pedal Position |
| 3 | 054-4 | Throttle Plate Angle |
| 4 | 101-3 | Injection Timing (Median) |
| 5 | 114-4 | N75 Duty Cycle |
| 6 | 115-3 | Boost Pressure (Specified) |
| 7 | 115-4 | Boost Pressure (Actual) |
| 8 | 230-1 | Rail Pressure - Specified |
| 9 | 230-2 | Rail Pressure - Actual |
| 10 | 103-1 | Current Fuel Pressure |
| 11 | 031-1 | Lambda, Current Value |
| 12 | 014-3 | Misfire Sum |
| Item # | Vag-Com Block # | Description |
|---|---|---|
| 1 | 001-1 | Engine Speed |
| 2 | 054-3 | Accelerator Pedal Position |
| 3 | 031-1 | Lambda, Current Value |
| 4 | 003-4 | ignition Timing |
| 5 | 101-3 | Injection Timing (Median) |
| 6 | 112-4 | Median Exhaust Temp |
| 7 | 115-4 | Boost Pressure (Actual) |
| 8 | 230-2 | Rail Pressure - Actual |
| 9 | 020-1 | Cylinder Ignition Angle Delay (cyl 1) |
| 10 | 020-2 | Cylinder Ignition Angle Delay (cyl 2) |
| 11 | 020-3 | Cylinder Ignition Angle Delay (cyl 3) |
| 12 | 020-4 | Cylinder Ignition Angle Delay (cyl 4) |
| Item # | Vag-Com Block # | Description |
|---|---|---|
| 1 | 001-1 | Engine Speed |
| 2 | 054-3 | Accelerator Pedal Position |
| 3 | 054-4 | Throttle Plate Angle |
| 4 | 101-3 | Injection Timing (Median) |
| 5 | 114-1 | Engine Load (specified) |
| 6 | 115-3 | Boost Pressure (Specified) |
| 7 | 115-4 | Boost Pressure (Actual) |
| 8 | 003-2 | Intake Air Mass |
| 9 | 230-2 | Rail Pressure - Actual |
| 10 | 103-1 | Current Fuel Pressure |
| 11 | 031-1 | Lambda, Current Value |
| 12 | 114-3 | Engine Load (actual) |
| Item # | Vag-Com Block # | Description |
|---|---|---|
| 1 | 001-1 | Engine Speed |
| 2 | 054-3 | Accelerator Pedal Position |
| 3 | 054-4 | Throttle Plate Angle |
| 4 | 101-3 | Injection Timing (Median) |
| 5 | 115-3 | Boost Pressure (Specified) |
| 6 | 115-4 | Boost Pressure (Actual) |
| 7 | 003-2 | Intake Air Mass |
| 8 | 230-2 | Rail Pressure - Actual |
| 9 | 015-1 | Misfire Cyl 1 |
| 10 | 015-2 | Misfire Cyl 2 |
| 11 | 015-3 | Misfire Cyl 3 |
| 12 | 016-1 | Misfire Cyl 4 |
Naturally Aspirated Vehicles
| Item # | Vag-Com Block # | Description |
|---|---|---|
| 1 | 001-1 | Engine Speed |
| 2 | 054-3 | Accelerator Pedal Position |
| 3 | 054-4 | Throttle Plate Angle |
| 4 | 101-3 | Injection Timing (Median) |
| 5 | 003-2 | Intake Air Mass |
| 6 | 011-3 | Intake Air Temp |
| 7 | 003-4 | Ignition Timing |
| 8 | 114-3 | Engine Load (actual) |
| 9 | 114-1 | Engine Load (specified) |
| 10 | 001-2 | Coolant Temp |
| 11 | 031-1 | Lambda, Current Value |
| 12 | 031-2 | Lambda, Specified Value |
| Item # | Vag-Com Block # | Description |
|---|---|---|
| 1 | 001-1 | Engine Speed |
| 2 | 054-3 | Accelerator Pedal Position |
| 3 | 114-3 | Engine Load (actual) |
| 4 | 114-1 | Engine Load (specified) |
| 5 | 003-4 | Ignition Timing |
| 6 | 112-4 | Median Exhaust Temp |
| 7 | 031-1 | Lambda, Current Value |
| 8 | 031-2 | Lambda, Specified Value |
| 9 | 020-1 | Cylinder Ignition Angle Delay (cyl 1) |
| 10 | 020-2 | Cylinder Ignition Angle Delay (cyl 2) |
| 11 | 020-3 | Cylinder Ignition Angle Delay (cyl 3) |
| 12 | 020-4 | Cylinder Ignition Angle Delay (cyl 4) |