Quote:
Originally Posted by DJCarbine
On the cars I have tuned, closed loop idle target AFR is 14.7 unless the FRS/BRZ is different
My main concern/question is that it looks like the ECU is running open loop with a missing secondary O2 sensor, to which there is debate about if the secondary O2 sensor is actually used for minor fuel trim adjustments on subaru engines.
I will plug in the seondary O2 tonight when I get home and see if it fixes the idle AFR readings
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14.7 is correct for target closed loop afr. Unless it has been specifically altered somehow.