Thanks for the tip on changing the scan gauge speed. Changed it to fast, and it has made a difference. Problem #1 is no longer a problem, as it is now clear that the fuel flow drops as the rpms drop back to idle speed. Before, the fuel flow seemed to lag a lot.
I'm still concerned about problem #2. Is it normal for my car to go open loop for a few seconds or even a fraction of a second while coasting in neutral?
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