Idle up adjustment

[gui67]

Hello Lance,
I saw this week that my IAC valve was more close then what it should be when I made a stop: 20 steps less then desired.
After looking in the MShift parameters, i saw that it corresponds to the value I have in the idle valve adjutment.
So i tried -20 and it adds 20 step, which increases the idle RPM.

I don't know if there is the wrong explanation in Tunerstudio or if MS3 substracts the value instead of adding it. Now it is good for me, but maybe something should be corrected either in the documentation or the MS3 code or the Mshift code for future users.

Should I also ask people from the MS3 forum?

Guillaume

[Bernard Fife]

Guillaume,

Thanks for spotting this. There is an error in the INI. The INI sends to the ECU the negative of the value you specify in TS. I am not sure how that crept in, it might have result from copy and pasting the advance retards (since retard is negative advance...)

You can fix this in any MShift INI with a text editor. Search for a line in the INI like this:

IACAdjngear = scalar, S16, 604, "", -1.00, 0.00000, -25, 25, 0 ; Idle adjustment on MS-II when gear == 1, tps == 0, speed == 0

change it to this:

IACAdjngear = scalar, S16, 604, "", 1.00, 0.00000, -25, 25, 0 ; Idle adjustment on MS-II when gear == 1, tps == 0, speed == 0

This had been done in the attached INI for 4.145. I will apply this change to all future INIs.

Lance.