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. 01bb000ff4b2 Changing f4b2 to 0000 I get 28.9 map. Is this correct?

Assuming you're using the 2 decimal point mover, the exact MTH would be: C350069D0000 for MAP in inHg But yours is close enough...... 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.