scangauhe MAP in in-Hg not PSI

Discussion in 'ScanGauge' started by pickler, Oct 3, 2014.

  1. pickler

    pickler Well-Known Member

    Hi I have a cansf ECU and I want to monitor manifold pressure or map in inches of mercury . not psi or kpa that scangauge provide. Can someone help me? I'm not asking for vacuum but for manifold pressure! Thanks.

    OK I think I got it. When using this I get 0 vacuum.


    Changing f4b2 to 0000 I get 28.9 map. Is this correct?
    Last edited: Oct 3, 2014
  2. CarlD

    CarlD Well-Known Member

    Assuming you're using the 2 decimal point mover, the exact MTH would be:

    C350069D0000 for MAP in inHg

    But yours is close enough......:rolleyes:

    For a vacuum reading you would have to change the subtraction to be whatever ambient pressure is, which can change with altitude and weather, obviously.

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