I have a twin turbo 4.8l. Runs great at idle and cruising. AFR at idle is 14.7-15.0. Cruising its at 13-14. When I go into boost, AFR drops to 9.5 and feels like the engine is missing. I have tried leaning out the boost ve table but it leans out my idle to 16 and cruise AFR to 15-16 and still cuts out. Anyone have an idea what to look for next?