too lean ?

famous bob said

you just went over my head -----lol
for lack of ''my'' knowledge it will read live data while the engine is running , just got to playing with that last time I drove it , think I need to get my son to drive while I play with the data/tuning screen . -----???

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I've tuned while someone was driving. It is fairly easy if you are only focused on a certain parameter. For example, you can cruise down the freeway and adjust the timing just to see how it runs. You can also adjust the air fuel ratio as you drive down the freeway to see what the best value for cruise is.