Hi there,
Equal to the speedometer which always display a to high speed, the fuel consumption indication will always be a "little" to optimistic and will indicate a lower fuel consumption than the actual fuel consumption.
Herewith the procedure to change the fuel consumption indication to display the correct consumption:
Use this
excel sheet: to determine the optimum fuel consumption correction value.
3 consecutive fuel action is the minimum for a decent calculation. (The more fuel actions you have the more "measurement faults" will be eleminated/evened and the better the final calculation is!)
Before doing the first logging make sure the tank is initially fully filled to a level wich you can easily be reached/checked again during the last filling action!!
The excel sheet is self explaining and an example is already given, but also herewith a little "manual":
Only the light green area's needs to be filled.
First you have to fill in the current fuel offset (will be 100% if it is not already changed).
Than you have to fill in the data of each filling action.
There is also a conversion line which helps you to enter your data in case your readings are in km/l. (the excel file calculates with l/100km) The file will only go to offsets of maximum 5%, if more needed send me a PM.
After you have filled in the light green parts the optimum fuel offset setting will be display in the right upper corner (in orange)
Now you are ready to change the fuel offset in your vehicle.
Start VAG-Com
1. Select Common Modules, Instruments (0x17)
2. Select functions, then 10 Adaptation
3. Select the proper channel (channel 3 for a Skoda Octavia II)
4. The current offset is shown (most likely 100)
5. Enter the calculated value from the excel file
6. Press Test to let the value be verified by the ecu
6. If Set button is enabled press it to make the changes final
Most likely Adaption channel 3 will always do the trick, but always verify and make sure that this is the case for your vehicle!
Little tip: write down the original value before changing it; in this way you should always be able to return to the original state.
Ps. NO WARRANTIES and NO LIABILITY FOR CONSEQUENTIAL DAMAGES at all !!!
