Seems like every time I try to tune a car I run into things I have never seen before. So I just installed a turbo on my 02 T/A. It's a stock LS1 that has already been dyno tuned previously for a TR224 cam. Ran great no problems, besides the turbo I added a set of Siemens 60# injectors. The car still runs and drives great (If it wasn't for the ugly scan I wouldn't think anything was wrong) but when I was logging the car when doing so testing the other day I noticed when driving around 30mpg constant speed that the car felt like I ran out of fuel for about 2 seconds and came right back. After looking at the scan I seen a big long lean tip in from the 02 sensor. After doing some reading I am scratching my head on where to start first because I am not sure if my 02s just became lazy all the sudden (But were fine before the turbo install) or if the Transient Fueling may need adjustment from what I have been reading, or my injector data is off. I have the Banish DVD with the data so I thought it would be a simple injector swap. But after looking at some other tunes with the same injectors I may have the wrong short pulse adder in but wanted to get another opinion quick on my issue first.
Attached is a scan of a 1/4mi run before the turbo and injectors. And a scan of the other day just testing with the turbo and new injectors. Also I included the tune that is currently in the car. I really only added fuel and removed some timing for testing. I usually try to get some kinks out before I take it to the dyno for tuning to make sure I don't waste his time if its something I need to replace or add.
Thanks in advance!