Originally Posted by
Kitch
My 8625 PCM using OD has some similar and some different DFCO values, yours make more sense to me.
I have AFR surging during deceleration but it's not overly noticeable in the vehicle. Your experiment with trying open loop made me think about looking at an old log I took with closed loop off. Sure enough there are no large AFR swings when decelerating in open loop compared to the large swings when in closed loop.
It will be interesting to see what you find to be the cause, I suspect it will help solve my issue as well.
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