my setup is a custom swap, im not out of pump, truck is running great, i used a ZL1 PCM as a base, my fuel setup is a walbro 450 intank, with a relay, it is working perfectly, i just recently added the FPCM so i can log Fuel pressure and to let know the PCM the actual fuel pressure,(FPCM isnt wired to the pump, im not loosing fuel pressure, my question is if i need to populate the flow rate VS press flat or upward form?