I’m wondering if anyone knows how GM gets it calculated mass air flow. I found this calculation MAF (lb/min) = [(Displacement *RPM/2)/1728] * 2.7 (MAP/IAT) and a few like it online but that’s for mass air flow at 100% volumetric efficiency. I am wondering if it takes this then multiplies by the VE table cell as a percentage and then compares it to the actual MAF reading. The reason I’d like to know is I was trying to come up with a way to data log and help determine and error that would cause a P0101 fault. I do know that map and iat are used to determine calculated mass air flow just trying to figure out how.
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