I got a new crate motor ls3 480 for a 2009 G8 and took it to a tuner in fort worth and it sounded a bit off with too much engine noise when I got it. Still sounds bad, so I took it to GM dealership since GM performance motors come with a warranty they said they did not hear anything that specifically sounded bad. So I have been trying to find the sound and diagnose. I got HPV12 but no wide band and created some logs and downloaded the tune to look at it. Not sure what I am looking for. But long term fuel trim was disabled, cot was disabled. So I have enabled to see what the trim was and it was +10 + running lean I have tried to adjust but the sound is the same. No wide band yet. Just want it to run right so I can drive it.