most of the cars are running slightly rich, this is to protect the engine itself.when the weather temp etc changed...the stock ecu still can compensate to the changes..ur touched is included ?! what i know is stock tuned in rich ,waste fuel all the time .
to get the proper air fuel ratio, u need to dyno for sure....i hav no idea. the guy from tom told me dyno is included!!!! go get it bro hahahaha