S300 Flex fuel

[Knox]

Hello, I have interesting issue. When I choose "digital s300 an0 (s300 v3 only), air fuel ratio goes to around 40 % richer. Is it normal? My flex sensor is gm 13577429, I used 2.2kohm resistor instead of 2.4kohm resistor because I couldn't find 2.4kohm. Does this make any issue like this ?

[Spunkster]

Has it been tuned for the ethanol content being used?

[Knox]

not yet because when I notice this big change in afr I wanted to make research to understand why ecu adds too much fuel when I choose “the s300

[Knox]

not yet because when I notice this big change in afr I wanted to make research to understand why ecu adds too much fuel when I choose “digital s300 an0”. Is ecu add fuel in background and if I remove the added fuel and tune from there. is it possible to afr change again ? or it just happen when enable the flex fuel? by the way ethanol content sometimes works sometimes don’t work. Is it because of different kohm resistor?

[Spunkster]

If you change the fueling it will change the AF.
This must be properly tuned.