03 5.9 Quadzilla, +50 HP injectors FASS 95

My fuel pressure from my FASS does a dramatic drop at exactly 1400 RPM. This happens driving or sitting still. I've gone over the entire FASS install. I was suffering from some fuel starvation through the tank module. I have a draw tube now.

My pressure holds at 16 to 17 PSI sitting still, and 15 to 17 driving under 1400 RPM. Actually it barely changes. As soon as i break the 1400 RPM mark, the pressure can fall down to 8 or 9 PSI. I'm thinking the actuator is opening too much at that RPM threshold.

I'm not getting any white smoke or erratic idle. It's not hard to start. I'm not getting any symptoms typical of a bad FCA. But it's weird the feed pressure drops so dramatically at 1400 RPM. I turn the tuner off and nothing has changed much, But that doesn't mean the Rail Pressure fooler in the Quad is not still active.

I have to find the solution to this soon. 8 PSI is too low

@Canadiandiesel @AccurateDiesel

Does this sound like something the actuator can cause? What is the diagnosis?

Tim Do you have these?