This function creates an adaptive factor, kstaa, for the injection factor at start fst_w.

Coolant temp at start, tmst, is evaluted into three temp ranges, zero, one, and two. Each temp range has it's own adapted value. There are also interpolating factors, WAD*T*, to allow a percentage of influence between ranges.

If the number of ignitions during start reaches a threshold, ZSYNAUSW, then the number of combustions is checked against ZBURNSOL and ZBURNDEC and the decision is made to increment kstaa for too lean or decrement kstaa for too rich. The amount to adjust kstaa is determined in DECKSTAI (amount to decrement) and INCKSTAI (amount to increment) based on temp range.

I think that the only a few small things might need to be adjusted. I'm not sure of the temperature ranges that cause problems and if it gets increasingly worse as temps drop. I was thinking have range 0 exclusively handle the problem range, but if there is a large difference within the problem range, then you could have range 0 for extreme cold and range 1 for slight problem temps. Range two would then be for normal operation during the warmer months. The interpolation factors may need a good amount of tweaking to balance everything.

KSTAI : to fudge the temp ranges slightly
KSTAMX0 : the max cap for range 0
WAD0T1 : to adjust range 0's influence on range 1
WAD0T2 : to adjust range 0's influence on range 2

The other interpolation factors may need some adjustment as well and I think that you would want very minimal if any influence between range 2 and the colder ranges 0 and 1.

IMO it will be much better to allow the ECU to adapt the amount of fuel required for startup and dynamically adjust rather than trying to fight for the optimal enrichment.

The values you see in KSTAI are not in *C. The axis is tmst (coolant temp at start) in *C and the map values define which range is active (0-2).

Yep...these are inactive temp regions. Anything other than 0, 1, or 2 will not be active.

I figure this STADAP only affects non start issues and  has no affect on warm up adaptation. I have no problems on initial start but the engine stalls right after the start if I dont give it plenty of throttle and keeping it over 2000rpms. This is at colder than minus10C. My KFFWL tables are maxed already so now Im looking for msd, KFFWLW and Stadap.

I should add: ev14 96# @4bar and E85

Thanks
As I have already maxed my KFFWL_ tables next calibration is the weighting MAP KFFWLW. I added 20% over zero temps and now I need to wait for the next really cold morning.

I have eberspaecher engine/interior heater but I'd like to get this sorted when or if my heater decides not to function. This morning was only  minus 1C and no problems but I only have that 20% on KFFWLW and MSD active under 1400 rpms, but the KFFFANZ is a bit mystery. I have the 40 and 80 columns at 2 sofar.

E85 is the most economical blend over here so thats why I use it over winter too.