napa 600

my question is what are you guys seeing fuel pressure wise inside the cab. i tee'd into the cp3 line after filter(rubber soft line) with brass tee and 3/8" hose to isolater(pricol). isolater to guage in cab filled w/ coolant as per instructions. guage reads steady 7.5 to 8 psi. the thing barely moves! i thought i would see alot more variance in pressure. stock lift pump and everything. also when i shut it down; the pressure held. will it bleed back thru the return ? is this all normal? thank you for the help. tst and ez wern't set very hi but i have read people sucking it down to 0 psi stock? how?

Maccandy

My fuel pressure is 8 - 9 lb and does not drop that much running hard. The truck is stock.