It's often suggested to drive 50, 100 or whatever miles for the PCM to learn the LTFTs after a re-tune.
Is it necessary for this to be a single session or, for instance, would (5) 20 mile drives = (1) 100 mile drive?
In terms of the histogram data collection, I assume values collected are based on the learnings by the PCM (since last reset) and not just from the current driving session?
Hopefully my questions make sense.
Thanks,
Scott