apexi powerfc map sensor - how to enable

[bk_]

Hi Guys,
I have tried to connect up the MAP sensor from the boost control kit to the PowerFC. However I am unsure how to enable the PowerFC to properly use the new MAP sensor and not from the old MAP sensor.

This is on a 1JZ-GTE (JZA70-based) PowerFC.

Is there a particular procedure? Do I need to have the engine off? do I need to turn off the ignition once the settings are changed from "NORMAL" to "APEX"?

Once I change it to "APEX", HC reads boost of "0.48kg/m^2" @ BAP.

On normal, HC reads -22mmHg, 2622mV

Much appreciated if anyone can help.

BK.

[bk_]

Any ideas?

I have a reading of 1.98V with the denso 6270 MAP sensor with a "reading" of +0.37kg/cm^2 (+3700 kg/m^2) on the hand controller.

stock sensor is reading 2.626V with a "reading" of -26mmHg (-354 kg/m^2), with current barometric pressure of 1005 hPa (10248 kg/m^2)

PIM calculation for stock:
PIM = 5346V - 3785
PIM = 5346*2.626 - 3785
PIM = 10253.596 kg/m^2

Which sounds about right since I know my stock MAP sensor is out by ~4% when comparing against stock toyota ECU and OBD-I reading.

But... lets do some calculations for the DENSO MAP sensor

PIM = 6585V - 3200
PIM = 6585*1.98 - 3200
PIM = 9838.30 kg/m^2

Now... 0.37kg/cm^2 is 3700 kgf/m^2... and:
PIM = 5346V - 3785
PIM = 5346*1.98 - 3785
PIM = 6800.08 kg/m^2

delta of: 10253 - 6800.08 + 354 = 3806.92

To me it looks like the PowerFC is still using NORMAL MAP sensor calculation, but using the input of the denso MAP sensor.

Do I have to rewrite the PIM scale/offset in order for it to take effect?

I'm lost as to what is the problem.

BK.

[bk_]

Found the problem/solution.

You have to ENABLE boost control kit to _properly_ utilise the additional MAP sensor.

if you do NOT enable boost control kit, it will use the new sensor as MAP sensor input (as evident by the 0.37kg/cm^2 reading), however it will use the default/NORMAL PIM scale/offset settings, not the MAP sensor type that has been selected (eg: APEXI).

seems like a stupid firmware bug to me.