Oh God!! I just spent $4000

[84LX89GT]

i have 30 lb injectors and 255LPH pump with stock lines....the return line is too small for that flow of pump, the line itself is a restriction and after i installed the pump, it now runs 85 psi fuel pressure at all times. I disconnected near the fuel filter area of the car before the tank from the plastic return line to metal line connector (to make sure pickup return wasn't blocking) and fuel pressure was still 85 psi, i pulled off the return line and ran a line into a bucket and fuel pressure went back down to 35 psi. the only thing between the regulator and line to the tank is steel line, which none of it was pinched and pressure was fine until i installed the pump. Upgrade your lines if you put in that big of a pump, or you'll have lots of Fuel all the time