okay now it makes more sense, you're dealing with the same thing I dealt with after I had my PSC installed. on mine I did find places where the hose was leaking but in the end PSC ended up giving me a different pump with a larger pulley that was also ported to flow more at lower speeds which also fixed the issue at higher speeds
I think I'm just ordering a PSC pump and reservoir today. As I mentioned the main reason I've been reluctant is me not wanting to run a CAI.