That is very insightful indeed, thanks. I had not been monitoring any other engine operations (e.g. EGR valve) and it could have very well had influenced what I saw.
VIDA does mention two ranges of the mass air flow at idle, in particular when the EGR control ceases (no exhaust gas recirculation?) the mass air flow is approximately 48 to 60 kg/h (13 to 16 g/s).
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