I have a 2007 trailblazer 5.3 engine is built ls9 cam with lsa supercharger. Running e67 ecm with SD patch. Fueling looks good idle and cruise but as soon as engine hits boost and goes into PE. Bank 1 goes dead lean 1.80 lambda. Bank 1 o2 sensor drops to .0020mv. But Bank 2 goes rich! .989mv. And engine stutters bad and won't build power. What would cause one bank to run lean and one to run rich. Zero leaks in exhaust or intake. All injectors ohmed 15.5 ohms. No ground issues found.im at a loss. Using fic 1000 injectors.