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Originally Posted by turbolarry
Where are your fuel trims at and the corresponding RPMS?
Try and get them as close to 0 as you can. +/-3 is perfectly fine. After logging and tuning a couple of Evo's I might change it to +/-5 which is OK too.
It took mine car a full three days (maybe four) for LTFT's to settle at 0% at 3000 RPMS. I'm +/-3 everywere else.
You just don't want things so far out of wack that the ECU can't do it's job
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When setting the low fuel trims does the car need to be under load? My seems to be acting strange. I reset the battery and when I try to set the 1000 RPM point, I have to go down to 0 on my S-AFC II to get the STFT to 0. I have 680cc injectors. Same with the higher RPM's? I am doing this while the car is not under load.
