[Odrapnew]

A9S under GUFB (or is it A).
It's not the same strategy as A9L.

I feel like this question has been asked more than once, but I cannot find good threads (maybe my search skills are degrading).

Anyway, under most conditions, my car runs good.
Fueling seems to be pretty good, except closed throttle deceleration.

I have DFSO active above about 2200rpm.
Under that, closed throttle decel, engine runs lean (~20AFR) and I get lean backfires out the exhaust.
I'm not a teenager with a Honda, so I want to get rid of the lean backfire.

I changed the battery offset values (from values on datasheet) which helped, but that caused it to run rich in almost all other conditions.
If I update the MAF, it seems to go back to extra lean on decel.

I've played with closed throttle OL and commanding rich, but AFR does not match LAMBSE.
If I have closed throttle CL, LAMBSE goes rich to bring to stoich, but then when I get back into the throttle it goes way rich.

What are some tips to help with the lean decel?

[cgrey8]

A9P is GUF1
A9S is GUFA
A9L is GUFB