Hondata

I have been getting very consistent gas mileage since 10/13 when my 12 Civic Si was last tuned on a dyno. On the highway, it was not hard to get 34mpg and 31 city (calculated).

Now, since I had to clean the water out of my gas tank, fuel lines, fuel filter, injectors, etc., my gas mileage has dropped (calculated) to 30 highway and 26 city.

Do the attached calibration and datalog* files from today tell you something that I am missing?

Thank you,

Steve

*One is a WOT run to 80 and the other is a mix of highway and city driving.

The fuel trim is negative, especially at low injector openings. This will affect fuel economy.

Thank you, Hondata! I will look into that.

You were right. Very negative fuel trim; running super rich at WOT. My tuner sent me a revised map; I will data log tomorrow and see what it looks like.

Thank you.