I am using OBDLink MX Adapter and a Galaxy S5 with bluetooth and Torque Lite— and am unable to change the unit of measurement from IN/HG to PSI on just one one display–that of “Manifold Pressure”. I have gotten on the “menu” and selected “Settings” and then “Units” and checked the box for “Use PSI” instead of bar and still get the readings for IN/HG.I go back and make sure that the “USE PSI” setting is still checked in the box–and it always is. I unchecked the box and there is no change–still only reads IN/HG.

I am able to change from “C” to “F” concerning temperature readings –but only have this constant issue of not be able to change IN/HG to PSI.

I have a turbo charged vehicle and am wanting to see the total peak pressure in the intake manifold when the turbo is putting out the total maximum pressure. And since the gauge only reads to “20” IN/HG–I am unable to determine what the peak pressure is. 20 IN/HG is only about 10 PSI. I suspect that my turbo is pressurizing to at least 18 PSI.

Does anyone have a solution to this problem of not being able to change units of measurement for just this single display of “manifold pressure”?

No–I haven’t tried–and I didn’t think it would be necessary.

Torque Pro has a Boost/Vacuum gauge that does
the same. Vacuum is read in inHg and Boost is
displayed in Psig by design. That is why I
suggested your own custom pid where you
could display in your desired units.

010B, 0170 and 0187 may be useful if your
vehicle supports them. (per Wiki).

If your turbo delivers a great deal of Boost like
some of the 7.3 diesel users (greater than 22 PsiG)
the default pid may top out then not accurately
read.

The developer, Ian, browses this forum and also
responds to email when his time permits.