The Idle def stuff from mrfred with that scaling called ISCV_AX2_8 is very confusing, as he calls it % Demand.
It is in fact Idle Steps, ie the step position (some specific tables are additional steps, but dont worry about that at this point).

To help in the short term, change the scaling to uint8, and call them steps.
This will give you a better appreciation of whats what.
As previously mentioned, start with small mods (steps hehe).

 

Yes that was I was saying to myself when I was looking at these defs, because in VIII it's defined at steps. It's in fact the initial/baseline position where the stepper motor will be. All corrections of demand% will added to this initial position. It's the "main" of ISCV routine.

 

OK, Just to make sure I understood this correctly, as i haven't made many changes to scalings, here is what I've got.

I have modified the scaling of the selected def below, but I should apply that to all the ISCV that are using the scaling mentioned, to uint8. I then changed the description of that scaling to read "steps".

I will now slowly up the vales at the arrows to see if that impacts my warm start idle.



Should that scaling change have been made in the 88590015 def or the 88590015.mods def, or both?

Also, you mentioned 'in the short term'. Is this something that isn't good long term?

 

Scaling is for you, to be user friendly. You could scale it whatever you want but the flashed output is still an hex value in the ECU. And yes 0 in the pointed area isn't something good. Compare yours to a stock map.

 

Every ROM i have for reference, and the stock 9 ROM all have zeros on those cells just like that table. I suspect its totally stock, like much of those talbes in my ecu. Can folks with cams that modify that table chime in with examples?

 

I know it's stock cams,but anyway here is my current table, not totally tuned. I'm waiting colder temps to apply final tweaks. Cold start is solid, goes to 1600-1700rpm for 3 second and quicly drop to 1000rpm.

-26 107
18 98
45 87
68 76
93 66
122 53
170 13
180 7


FIY my stock IX map here contains this:
-26 190
18 150
45 125
68 125
93 100
122 65
171 15
180 10

 

I have been over and over this trying to find a solution with the help from you guys. I did find something else that might be the forest for the trees thing.

First I would like to see if anyone else could provide USDM MR 9 values for the table noted above for comparison. All my stock reference ROMs are different that Domyz provides. ISCV Demand CTS Addder (FFFF6E84)

Now I also found that my Idle Stepper Lookup Table I currently have is different than my reference ROM. Would this kind of setting exhibit itself in warm start issues. Seems like it to me, but I wanted feedback before I go changing it back.



I may have futz'd with this when I was aimlessly fighting a TB leakage problem, but I can't recall what I did and didn't do.

 

Yeah just put this column back to stock (like the 34C column). Those numbers are illogical and will mess the iscv behavior.

 

This is the stock value: