Hondata

someone can showme the steps i need to follow for tunnig myself my s300. i want to learn need help 8)

Be careful. If you don't have a robust base calibration, you might ruin your engine.

I'd start with reading all the help files and read as much on this site as possible.

Then get yourself a wide band.

There's a lot more to it, but it all starts with the first step..you learn as you do.