Fuel Line Question

[train80]

I am Building my first e30, and i have just dropped my engine in and i don"t know where the 3 fuel lines distribute to. The three lines come up from the chassis on the drivers side right near the brake booster (indicated by the red circle). I know fuel has to go to the Pressure Regulator (yellow circle). Also there is a line that comes from the back of the intake manifold and the return lines (green circle). Trying to figure this out, so i can get my car running. Heres the picture.

[arty818]

green circle is fuel line for ur cold start valve, should go into a T fitting coming from your main fuel line which should be atached to a fuel filter somewhere in the red circle.

[jlevie]

One of the two lines from under the car is the fuel supply and the other is the fuel return. To figure out which is the supply, connect a hose to each and point the hoses into a jug. Jumper the fuel pump relay and see which hose delivers fuel. The supply hose feeds the rail and cold start valve via a tee (as noted above). The return line goes to the fuel pressure regulator.

If you are replacing the hose, the supply side hoses have to be hose rated for fuel injection service, but the return hose can be plain fuel hose.

[train80]

cool. Thanks.