I have noticed I am only getting about 10 PSI from my gauge and on the Power FC it reads 1.10 kg/cm2 which converts over to 15.6 PSI. Now before I installed the Power FC I used to see a constant 11 PSI on the gauge.

 

Most PFCs display lower boost than what a good boost gauge shows.

Have the map sensor output voltage checked from 0 to 14.3 psi and compare it to the RX7 manual and what is displayed on the PFC as PIM voltage.

 

Mine does that too under boost and under vacuum.

When
PFC = .70
Gauge = .80

And under vacuum
PFC = -.345
Gauge = .445

Strange proportion.