Reflex can run as a standalone port injection controller. It still wires up the same, inputs cam, crank, and boost pressure and triggers PI based on internal maps, the problem when running reflex as a standalone PI controller, it doesn't _output_ over CANBus, so the rest of your tune doesn't...
I've heard these arguments too, but it's never really resonated with me. You still (obviously) need to tune, a port plate or a manifold is "plug and play," too. Maybe the apprehension is the additional controller that you need? Even still- you need a tune, so what's the problem?
FWIW- I...
Time to get the volt meter out. Chase it all the way back to the pump.
Jump the pump and make sure the relay is good. Skip the relay and make sure the pump is good.
Sounds like you have an almost similar setup to mine.
The PI fuel loop is completely separate from the DI loop.
In this case, "2550kpa" basically means zero, there is no pressure in the line. My car reads that same bonkers value when I start the car before I hit 2k rpms, or if the car idles...