Quote:
Originally Posted by 86TOYO2k17
The basic things to look at are IAM getting to and staying at 1.
It’s possible if you just turned car on and did a pull that IAM was still at .7 and didn’t have enough time to go back up to 1. that would cause a noticeable drop in power.
Another thing would be LTFT and STFT combined values should be less then 10% preferably under 5%. If they are really high could be exhaust or vacuum leaks depending on + or -
AFR at WOT I believe on OFT tunes should be mid to low 12s, if it gets down to 11s that pretty rich for NA and 13s is starting to be risking running lean.
Lots of other things. But those are the most basic easy things to look at.
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Just went and logged a pull. The IAM started at .7 when I turned the car on, and while driving went to .94 and stayed there. Not sure what that means.
The fuel trims are slightly worrying. ST Ranged from +7 to -15. The LT ranged from -2 to -11. Not sure exactly where in the log i should check the reading to get what I'm looking for. At the start of the pull it ranged from ST @ 4-7 and LT at -4. Once over 2k it went to 0 ST and -2.34 LT and stayed there. I guess that was where it went closed loop?
While the throttle was >90 the AFM was in between 12 and 13 so that seems alright. Over the whole log it ranged from 11 to 20. That was while idling driving normal etc...
I attached a CSV of the data log from the OFT, also
https://datazap.me/u/unholypanda/pull?log=0&data=1-13