Idle speed adjustment not working ...
#35
EvoM Guru
iTrader: (50)
The idle algorithm for the 9 is waaayyyy different than for the 8. For the 8, the idle algorithm is within a single subroutine. In the 9, its spread among at least 15 different subroutines, and the algorithm itself appears to be much different. I dissected it for a little while, but I have to stop now. I'll try to pick it up again this evening.
Here is the one previously undefined idle table that I found:
<table name="Some Desired Idle RPM" category="Idle" type="2D" address="3d82" flipy="true" scaling="RPM8">
<table name="Engine Temp" type="Y Axis" elements="8" address="70c2" scaling="Temp"/>
</table>
This can be inserted into the 88590015.xml file. Be sure to restart ECUFlash after inserting it. Let us know if adjusting it has any effect on idle.
Here is the one previously undefined idle table that I found:
<table name="Some Desired Idle RPM" category="Idle" type="2D" address="3d82" flipy="true" scaling="RPM8">
<table name="Engine Temp" type="Y Axis" elements="8" address="70c2" scaling="Temp"/>
</table>
This can be inserted into the 88590015.xml file. Be sure to restart ECUFlash after inserting it. Let us know if adjusting it has any effect on idle.
#39
Alrighty .. I made some logs. Basically, the desired idle neutral, drive, and the new one Mrfred found seem to have no effect on the actual or target idle according to EvoScan. The tables I tried can be found in the "desiredIdle01.xls" file.
http://www.frameleft.com/logs/desiredIdle01.xls
http://www.frameleft.com/logs/desiredIdle01_AC.csv
http://www.frameleft.com/logs/desiredIdle02.csv
http://www.frameleft.com/logs/desiredIdle02_AC.csv
Now, I did find that the target idle RPM the ECU requests is being met almost exactly. We just need to find the tables.
http://www.frameleft.com/logs/desiredIdle01.xls
http://www.frameleft.com/logs/desiredIdle01_AC.csv
http://www.frameleft.com/logs/desiredIdle02.csv
http://www.frameleft.com/logs/desiredIdle02_AC.csv
Now, I did find that the target idle RPM the ECU requests is being met almost exactly. We just need to find the tables.
Last edited by TouringBubble; Jun 27, 2007 at 08:22 PM.
#45
I would assume for the AC we are looking for something similar to the adjustment on the VIII ...
This won't solve the basic idle adjustment issue, but it would be a start.
Thanks again for all that you guys do for the community!