I have an AirDog 165 and my aftermarket fuel pressure gage idles around 24-26 psi. When i get on the throttle the pressure will slowly drop to 19 psi and thats the lowest itll go. Driving normal it doesn't fluctuate but maybe 1 or 2 psi. My fuel and fuel water seperators have been changed since ive noticed this. There isnt any change in performance wise and i haven't had any other issues. If anyone has any insight about this, id appreciate it.