Chasing this misfire issue after trans swap. I bought the truck with the engine turbo setup and it wasn't quite right. It's much worse after the trans swap. When I ramp into the throttle the AFR gets richer and richer until my AEM wide band reads 10.00. It will start misfiring at that point. Is it in the tune? The truck has always run VERY rich.
2009 Canyon 5.3 TC76 turbo