2012+ US/Canadian Civic Si / 2013+ ILX
3 posts • Page 1 of 1
Where does the ECU get the "suggested change in fuel" from? Before, I was going by the suggested fuel change from the fuel maps. It was saying everything was good with only around 1-2% in most places. However, the short and long term fuel trims were about -8 to -10%. So I took away about -8% fuel across the board. Now, the fuel trims are good, but the Suggested Fuel Change is showing to add about 8% fuel across the board. Any ideas why the Suggested Change and Actual Fuel Trims would be different from each other?