Got a question regarding the fuel system on these trucks.

I have noticed there are three hard lines running fuel, one into the pump from the tank, and the other two look like return lines from the engine block.

Are both of these return lines or is just one of them a return?

Could I dump air from my separator at low pressure into this line?

What have yall done with air removed from the fuel system?

Thanks

WB

 

Here are some good places to start.

https://www.ford-trucks.com/forums/s...0&page=1&pp=15

https://www.ford-trucks.com/forums/s...lift+pump+pump

Good luck. You'll probably have a headache when you get through it but it's well worth the read.