I will give you the build first. This is a new built 408ci stroker. It has a BTR stage 4 400ci+ camshaft in it with some LS3 heads. I am running a drive by wire setup with the adapter for 8 to 6 pin Tbody. It has a 2008 suburban Tbody. My system is from a 2005 Escalade DBW. My tune is setup to tune SD. I am using an AEM wideband. I am having 2 problems. 1 I am lean on start up until the engine gets through the startup enrichment period. I Believe I can tune this out with the startup tables. My bigger issue is that I can idle the car all day long but when I touch the throttle, it wants to or it will stall immediately. I did not change any throttle body tables and do not know what to change and how much. I did change the injector size and engine size before firing it up the first time. I have also modified the base idle air flow. I am mostly concerned with the throttle response. If my data log needs more info, let me know what you need to see to help me out.