what should the co2 be on idle on a cossie running greens etc

and fuel pressure

i dont know what the co is until tomorrow when it goes for mot but the ecu hasnt been touched from std

and the fuel pressure is reading 40psi

also on fuel preesure i think its 3.5 bar it should be so i would need to raise it to around 45psi?

do i do this with vac pipe on or off as when i disconnect the pipe the pressure rises to 50 psi