Quote:
Originally Posted by steve99
oft tunes have lowest fuel trims arround 70-75% ethanol if you hapoen to have true 85% ethanol then you will get high positive fuel trims
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Hi Steve. A majority of my understanding of e85 is from your work on this forum actually so thank you.
Perhaps I'm interpreting your instructions wrong, but shouldn't "normal" ltft values stay within +/- 10%? Suppose it's possible I'm getting true 85% but these higher trims seem to be consistent throughout multiple fill ups and different stations rated for e70% - e85% (Los Angeles). So you're saying seeing up to 15% ltft at idle should not be alarming? If so i'll take your word. Would there be a max ltft % to allow before being concerned, and if so what else should I look into then?