Fuel Delivery Options

[lsintampa]

75 914/4 2.0

Most drawings on fuel delivery that I can find show the fuel pump having three ports. Mine has only two ports (inflow and outflow).

Gas tank and motor are currently OUT of the car.

Looking in the front trunk, there are two fuel lines running to the engine bay. Outbound and inbound. Which of those two are sending fuel to the motor and which one is the return?

Same question on the tank itself. There is a skinny sock filter on the inside of the tank, I'm guessing that is the line sending fuel out of the tank to the motor, correct?

Thanks,

Len

[r_towle]

starting at the tank.

Line with the sock is the sending line, feeds pump.
Pump mounts under the fuel tank on your car, drivers side.
Filter mounts against the wall, there should be clips for a square filter that I recall is NLA...but a BMW filter can be used, it has the same size ports.

So, fuel comes out, goes into the filter, then the pump, passneger side of the pump.
Out of the pump, drivers side, loops down to the fuel line at the tunnel.

The feed line comes out of the tunnel and connects to the passneger side fuel rail, so from the tunnel it goes rubber, then again to plastic, then rubber at the passenger fuel rail.

The return line goes up to the engine bay right next to the feed line, but it connects to the system after the cold start injector and loops and remaining fuel back to the tank.

rich