Quote Originally Posted by silvyrado4.8 View Post
yea ran 93 oct a couple time back to back and on the log with 93 oct it dont show that much knock retard but still pings and it seems like the stock tune has more pep and has far as the timing chain motor has 44,000 miles on it could it be that already thanks guys for all ur help

mike
So do you have efi live editor? If so why not just start from scratch and tune it your self.