I have a question and maybe you could give me a little advice. I put on some long tube headers and wanted to get rid of the engine light so I got a tune. I had a guy in Springfield, IL do it for me I believe he used HP on his laptop. We put the car on a dyno and he worked his magic making changes. The question I have is that now I have a code that comes up saying something about shifted lean. When this code comes up I just delete it with my hand held tuner. Do you think this lean code could be damaging to the car? I have a theory that it only comes up after I fill up and reset the trip. I also only use 93 octane in the car.