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Oscillating AFRs at idle when rolling

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Build info:

07 WRX, PTE6266, flex w/ ID1700s, tuned on a Haltech Elite 2500.

I'm new to tuning and I have finally dialed in my map to keep my stft and ltfts solid and afrs steady where I want them. I'm having a weird issue where when I clutch in and the cars drops to idle while it is still rolling, the afrs bounce quickly from 12 to 17 over and over until the car comes to a full stop where it runs normal. Any ideas?

Check if you have the zero demand fuel table enabled. This can have a weird effect on the rolling idle if not set correctly. I usually don't use it and just disable it.

And i'd also check the values of the base fuel table at your idle rpms. eg, 500 -> 1000, usually in the bottom left corner.

Like the rest of that table, you don't want it all over the place.

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