HKS Maps sensor set up calculations
For HKS type 3 map sensor (the one you mentioned) the parameters shown on Fcon is X=3, Y=4 and Z = -375
The equation used to work out the pressure from the output voltage is
Pressure in mmHg(where 0 is regarded to be vacuum)= X x Voltage in mV / Y + Z
i.e.
Pressure = 3 x voltage / 4 - 375
So if the sensor is outputting 500mV,
P1 = 3 x 500 / 4 - 375 = 0 (mmHg)
If sensor output is 4500mV
P2 = 3 x 4500 / 4 -375 = 3000 (mmHg)