I will be running E85 in my truck very soon, but most of the time I would like to run E10 regular gasoline. I was thinking of switching tunes when I make the change of fuel(basically back on forth on the days I go to the track). I see that there is a fuel sensor GM 13577394 that might work if I knew how to wire it in. I have been unable to find what I need to know to make this work. What exactly do I need to do? It appears that some vehicles calculated an estimated alcohol percentage in the fuel through sensors. I am not sure that I can make this work as I am running without a MAF. I am running the COS in my sig. Any help would appreciated.
Thanks,
Daryl