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Ive seen some people zero this out and some people leave it at .96 .
Im in a boosted 6.1 and I noticed when I zero it out the idle struggles a little, Idle timing advance and fueling reads the same weather its zero’d or .96. So what exactly does this do?
The PCM uses Calculated MAP unless the box is checked to enable Sensed MAP. Once sensed MAP is enabled, the threshold tells the PCM when to switch from considering Calculated to Sensed. So at the default of 0.96, the PCM will look at Calculated MAP unless PRatio is over 0.96, then it will used Sensed MAP.
Calculated MAP is smoothed, thus the idle is better; but will hit a ceiling somewhere around baro kPa. So when you go boosted with an OEM non-boost operating system, you need to enabled Sensed MAP so the PCM can read MAP values above baro.
Thank you, thats what i needed to know ill play around with it a little.