So I have SEVERAL scan tools at my disposal, two scanners a bluetooth ELM327 and a USB ELM327, I use OBDwiz, ScanXL Pro, Torque (My Favorite).... So my question is on every one of these tools it has a "Volumetric Efficiency" input that defaults at 85%, The only mod on my 2003 TL-S is a TB coolant bypass and an Injen CAI. How exactly do I figure this number for my car as everything i've found on google is talking about using a Mass Airflow sensor.... Well problem is our cars wont give a reading from some sensors. And if i'm not mistaken is it that one or the MAP sensor that we don't have?
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