Either a blockage in the line,low pump pressure (but it's new) or a bad rack.
You could pop the pressure line off the rack and star the car and see what kinda pressure your getting...very messy tho
2014 black Mustang5.0 track package, Recaros.
Roush axle back with 4.5 tips /Boss diffuser
Barton twin post shifter bracket
Whiteline adjustable sway bar
Whiteline lower control arm relocation brackets
Whiteline adjustable lower control arms
05 white Mustang 4.0 sold
05 white Dodge 2500 Cummins sold and missed