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Reporting back that replacing the upstream O2's appears to have completely solved this issue for me. My engine is also running smoother than ever before, I had actually thought my throttle actuators might be going bad but no longer do. Wish I had done this sooner!
Also wanted to mention that the engine needed to be running to clear O2 adaptations, I used a Foxwell nt510 OBD2 scanner for this.
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2021 Alfa Romeo Stelvio Quadrifoglio | 2.9L | Trofeo White Tri-Coat | 8-spd
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