It is on the return end. Fuel goes into the rail at the front and exits at the back through the regulator.
A leak on the return or supply lines and the automatic feeder is not working
A pressure differential switch, is a switch that reacts to pressure difference of two points, usually your supply & return side. If the pressure between these points are high, it then "reacts" notifying of pressure problem on the system.
Supply is above and return is under.
its the fuel filter it has a supply and return line for each tank and a supply and return line for engineif your going to change it be careful not to damage the o-ring cause if it leaks then no fuel will get to the engine Actually its not really a fuel filter. the four lines are a pressure and a return line (2 from each tank), there is a diaphragm in there and it only lets fuel from the tank that has pressure go to the motor.
What size supply register are you using? The return register should match the supply. If the return is too small you will have positive air pressure in the room, and if too large you will negative air pressure.
Return ducts are under less pressure, but they need to move the same amount of air, so they must be larger.
The leak detection pump pressure switch is located next to the service vacuum supply. It will be connected to the LDP filter and below the EVAP canister.
primary return
In a(n) ____________________ fuel oil supply system, one pipe is the supply and the other acts as the return.
I would say ok on the supply but not hte return.
primary flow
back of motot where fuel supply hoses are mounted to fuel rail its mounted to injector fuel rail, on return side