My exhaust pops a lot at and above 3,000 RPM's when crusing at that speed. I recently installed an LT1 Scanmaster and noticed that the O2 reading for the left sensor dropped to around .050(Had the Scanmaster on the default O2 & Knock Retard setting) when the popping occured. I read the guide on Injuneer's site (great job and thanks for the info) just wanted to see if my conclusion that the A/F ratio was leaning out and causing the popping was correct.

Thanks,
Keith