Blackbird

I assumed it was the stoich value on the fuel tab. I changed it from 14.7xxxx to 14.9xxxx and when I log with my efilive it tells me my commanded a/f is 14.4

Can somebody enlighten me on where I am going wrong and how to change my target a/f for idle and cruise. I am trying to tune for gas mileage (don't laugh) and I figure upping the target a/f to approx 15:1 is a easy way to eek out some gas milage.

thanks.

pekkaz

That would be interesting if it's possible. Dunno though, 02 sensors are accurate only at 14.7 and in addition the only accurate thing there is the switching point between high and low voltages. Absolute voltages around 14.7 vary according to component variations and operating conditions. The computer wants to see as much switching as possible between high and low voltages indicating 14.7 a/f or at least that's the way I have always though it must be working.