Hello Scotty,
I appreciate your channel and honesty. Could you possibly do a segment on live data, such as what is important to look for when scanning a used car, what's normal and abnormal and what the values mean? Thanks for all you do.
That would be a LONG, technical video that wouldn't help anyone in the end as most people would be totally lost on the language.
You need to be a mechanic to understand the values of all that information. It is not something you can pick up in a simple 10 minute YouTube video. And the data is also fluid, meaning what would be a bad rating for one car could be acceptable in another due to differences in age, mileage, condition, motors, etc. etc.
Start here: try it on your existing cars and see what you find. For mass airflow reading, convert the units to grams/s and the value should be around (ballpark) the displacement (in L) of your engine.
https://scanneranswers.com/read-live-data-from-obd-ii-scan-tools/
https://www.motor.com/magazine-summary/interpreting-generic-scan-data-march-2005
