Same wideband or new sensor? I had a similar issue. Had car setup for 11.3 afr. Used my wideband on another project. New wideband shows 10.0. Swapped sensors and I’m back at 11.3.
It’s a new Spartan controller and Bosch
Wideband. It’s funny because the AFRs are fine everywhere else except under boost. Fuel is being driven by the VE table with just a small AFR correction under boost so it can’t possibly be adding that much fuel to drive it down to 10.1. I’m going to recalibrate the wideband and cross my fingers.