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Originally Posted by bbrowncods
LAF, Your IAC is good. It doesn't have to be axact. In fact the IID now compensates for what IAC is at idle. Mine varies between 28-34 depending on engine temp and outside air temp and pressure. Which makes sense.
89% BLM means the injector fires at 89% of what the calculated PW is (based on AFR map, Alpha-N map, and EFI inputs). So when you apply the BLM that changes the Alpha-N table, and then next time the calculated AFR is right on.
On the IID the Front BLM changes the Front Cylinder Trim Table and that table is a % of the rear actual PW (O2 sensor corrected).
I know you don't have the IID yet, but I would say that your IAC is good and go with that.
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As always thank you for the reply. It is dead nuts on at 33 today, I think it needs to run longer then I was to set in the log file, I have to remember I was watching Live View and not a running log and I was shutting it down at 110C.
Anyway GROCK told me a long time ago the HE#* with the log file, Live View is it period I just like to torture myself I guess. Odd thing when I got this to 33 on the Live view my TPS went dead nuts on 4.0 WITHOUT adjusting the TPS sensor. Now in the year I messed with it I could NEVER get 4.0 TPS at IAC of 35.
Onward: I guess a more direct approach on my question on BLM is what can I adjust to change the BLM tables to achieve 95% I do understand it is PW/BLM that affects Alpha N or is that screwed up? At any rate if I am at 100 BLM would I add fuel to the AFR map or alter Alpha N. It seems if I am running 100 % I need to add something, somewhere to make that number a 95.
As I am not a tunner but I have spent a lot of time looking at TPS, RPM, VSS, and AFR in my log files and if I can grasp this concept I think I can finally make this pig run the way I want.
Is is running great now suffering a drop in RPM, slight, but there at very hot idle, adjusted ET based RPM and increased fuel in the 0 and 2.5 TPS position slightly.
The upgrade is what started this in truth, as I wanted a fresh map with the 3.37 gears in and built from scratch, and of course my obsession with IAC, (which was way off, honest) when I have to send the ECU in and they convert my map. Sure it is not needed but just me.
So a few more hours, front trim it on Saturday you know the 5 or six runs you make under varying RPM and TPS positions and stop and download each one, not bad but takes a little time and finding the WOT road is sometimes a challenge. I do think my dat file was shot (self inflicted) and I was not real good at naming files intuitively in my first few months. Oh well, not hard to do and it is running pretty "sporty" now.
