| If your on E85 all the time and not running a gas blend it shouldn't be needed. The wideband will speak if there is a large change in content. If you have tuned your car to the ragged edge i could see it help. But just watch AFR after a fill up for a change. I have heard stand alone guys using it as an input value and mixing pump to e85 as they please without pulling out the laptop each time to adjust, because they had set it up to act as flex fuel management does. That is where the ETA shines.
Houston Z www.houston-nissans.com
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