I currently have a bbk fpr that ranges from 35-70psi. It went bad so I bought a new one with the same range. I have no clue how to install it or set the psi. I have an aftermarket fuel pressure gauge on the car and at idle it reads about 38 psi. with the car off and the fuel pump on, it reads about 42 psi. Any info you have regarding how to set the new one's psi would be greatly appreciated. Thank you!