Replace 74 Fuel pump with 73 style pump

[casey79westfali]

Ok so I just picked up another 914 today. This one has stock fuel injection. The fuel pump was bad so the previous owner removed it and bought a new fuel pump but the wrong year. The original pump had three outlets (S, R and D). All the lines are still intact. The fuel pump I have has one inlet and one outlet. I have wired the pump temporarily with spade connectors to the stock pump plug and it turns on with the ignition.
My question is can I use this pump temporarily just to see if the car runs, its a fuel injection pump but only has one outlet and one inlet. I basically am just going to attach the supply line to the pump and block off the other two temporally. Will this cause any issues, is there an alternate way of hooking this pump up?

Thanks

[Dave at Pelican Parts]

It sounds like you are wanting to use the 75-style pump.

The "R" port on the stock pump would go to a Y that connects to both the return line to the tank, and the fuel pressure regulator. Without the "R" port, you just hook the line from the pressure regulator to the return line. You can do that relatively easily by replacing the Y with a straight-through piece.

If you have the actual 75-76 914 pump, the inlet fitting is a different size than the original pump. So you will have to fake up an adaptor between the fuel filter and the pump.

Plumbing supplies can be used for those. I'm not certain that I would trust them permanently unless they were soldered, but they should at least work for a while. Make a habit of checking for leaks.

--DD