I have been reading numerous reply's to threads tonight. Should I have given my 87 tune more time to be learned by my 2007 Tahoe before uninstalling? I get little to no KR at WOT, but alot of ping and KR under light to high load at lower RPM. The ping is very loud with the 87 tune using 1/3 to 3/4 ...

I guess it is bad gas in the Dallas area. Running the stock tune I get a KR of up to 5 at very low load, and 2-3 under heavy load. I was empty and purchased fuel from a different supplier (QT 87) and still have KR. I guess I will stay with the stock tune, 87 octane was $3.05 here today.

I updated to the v 8r10 a few weeks ago in my 2007 Tahoe. It now knocks and pings pretty bad with the 87 performance tune. It did not do this with the previous version that was in the tool when I purchased it. I have since removed the tune as I was concerned. Any ideas?

Thanks