Thank you guys.
I totally understand the overflow concept. That valve works fine. IF, i have the lift pump hooked up straight to the IP
My fuel routing is correct but when i try to prime the filter, the pressure that should cause the fuel to enter the IP and force air out is being lost through the return hose. I can hear fuel dumping back into the tank because this is the path of least resistance.
One thought, are they separate systems?
Does the banjo bolt connect only the return system or does/should the hole at the bottom allow fuel to flow straight from the filter to the return? If it shouldn’t, then maybe it was overtightenwd without washers at some point and now does?