STFT Adding fuel on deceleration

[69camaro5speed]

I am getting big + stft on deceleration even when 02s show rich and my wide band goes rich any ideas
I have turn the 02 sensor setting inside out with efilive and brand x nothing helps after about 60 flashes
any ideas ?
Here is a screen shot

[69camaro5speed]

I turn the dfco back on seems to work much better on gen 5 stuff problem fixed

[joecar]

Ok, I was thinking it was DFCO... thanks for confirming that.

[69camaro5speed]

The dfco was off in that snap shot,If you look it was adding to much fuel
(stock o2s where in 8xx and still adding fuel )My wide band was showing rich also

The only way to fix it was by turn the dfco on so it would shut off fuel and not shove max +stft