-- 20 is idle with EVAP Closed and 17 is Idle P/N AC off....
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1) What might be causing the lingering value in the LTIT cell? I guess when I reset the trims in the VCM controls, it doesn't reset this number. The maximum value as noted in the tune is 3 g/s, and the scanner holds it at 1.67 g/s.
-- Is it an automatic or a stick, the 17 says Auto. The 1.76 for IG wont change if you are in P/N. Now that LTIT is stuck at 0 so I will need to see the tune file to see what the limits are set to.
2) The AFR seems a bit rich throughout the tune, even in CL. Should I go about adjusting the OLFA and VE tables? I might should recalibrate my WB again just to make sure. I've also heard the preloaded NGK AFX transfer function might be a shade off, but I've never had a quick enough eye to watch both the computer screen and the WB screen.
-- It actually looks pretty good...I need to see the tune too see what stoich AFR has been set to, if 14.2 for E10, then it is good.
3) If I add the Desired Airflow (positive number) to the STIT (negative numbers), it would make the overall value negative. How's this possible? --
You dont add Desired to the STIT, the Desired Airflow is the combination of all airflow adders to arrive at a required airflow, you start with the basel idle Air (RAF, BRAF etc) and then you add items like the LTIT, STIT, FAN Airflow, Cracker, Follower etc. By turning off the Fans, no follower/cracker (not moving the car or throtle blade) your LTIT+STIT becomes the error correction values for the BAse idle air table. You set up a histogram at the temperature breaks and then copy/paste add to the RAF table. That will bring your STIT and LTIT closer to 0, I like to get about -.2 or so. takes several passes at it.
At the end of the day, I really do think the car idles great, but the numbers don't align with what I feel like I am experiencing. If there is room for improvement, which I believe there is, I would like to reach that goal. I've attached the latest log and config file.
Idle Tuning 20150506.hpl
IDLE-Airflow.cfg