Replacement Fuel Pump - What do you do with Third Fuel Line? Options

[ChrisFix]

The fuel pump in my 74 1.8 L-Jet seems to be dead. I plan to pick up the Bosh single inlet/single outlet pump at Napa (Part Number: BSH 69133). The dual relay at the battery checks out good, and when I turn on the ignition, I get a single click from the fuel pump, but no priming/whirring sound - and no fuel delivery. Engine will fire if I squirt a bit of starter fluid in the intake snorkel, then quickly dies.

What exactly do you need to do with the 3rd fuel line on the current pump? I've found a few posts that simple say "convert it to 2-line pump", but I'm out of my depth with knowing what to do that won't compromise the car's, or my, safety. I searched but couldn't find any drawings or pictures of how to route the lines, or what to do with the 3rd line.

Any detailed advice would be welcomed!

Thank you,
Chris

[ClayPerrine]

Consider moving the fuel pump up front under the tank when you do the install. Also, I used a ford carburetor fuel filter on the intake side of the pump to protect it from crud in the tank.

Tangerine racing lines are great. I have installed close to a dozen kits now, and they fit perfectly every time.

[ChrisFix]

Consider moving the fuel pump up front under the tank when you do the install. Also, I used a ford carburetor fuel filter on the intake side of the pump to protect it from crud in the tank.

Tangerine racing lines are great. I have installed close to a dozen kits now, and they fit perfectly every time.

After seeing the heat marks on the electrical connector for the fuel pump, I'm inclined to believe getting it away from that heat is a good idea.

When you say "under the tank", is this the location the 75-76 models used, or is there an alternate location that doesn't require the specific cover plate Porsche used?

[ClayPerrine]

When you say "under the tank", is this the location the 75-76 models used, or is there an alternate location that doesn't require the specific cover plate Porsche used?

I have the fuel pump under the tank in the well by the tank connections. The Airtex E8445 pump is small enough to mount there without interfering with anything else. Plus, I have a Ford carburetor fuel filter on the inlet side, both to make sure the pump doesn't get crud in it, and to use as an adapter to the suction side fitting on the tank.

Lots of people put it in the steering rack well so they can get to it in case of failure. Frankly, I never had a problem with pulling the tank to replace the pump. It's not that bad of a job, and you don't have to push the gas back uphill to the lines.