Electric Fuel pump installation

[Mat M]

Greetings to all.

I have been searching/researching the installation of an electric fuel pump on my 01/71 for a few days, on this and other sites, and I have have found where and how to install the pump and to which wire it should be connected, as well as where the power should be connected on the T connector behind the pass. side of the radio.

What I have not found, and I am asking because I am a complete moron when it comes to vehicle electrical systems, is:

1) How, exactly, would one run a power line from the oil pressure sender to the T connector? Would the extra electrical load of the fuel pump inhibit the operation of the sender? Those are some small guage wires, IIRC.

2) I do not understand relays for the life of me, where would one be installed in relation to the ignition, battery and oil pressure sender?

I understand home electrical systems to some degree (multiple phasing still makes me scratch my head) but I am paraniod that the slightest mistake will make my car inoperable, and I just CAN NOT have that!

TIA!

[hd240z]

Mat

Its been a while since I installed my electric pump, but I think my car already had a separate fuse holder behind the radio for the green fuel pump power wire. All I had to do was install a fuse.

I would not run the fuel pump off an oil pressure switch as it complicates the engine start sequence when there is no oil pressure to start the fuel pump. I am currently running my electric pump directly off the factory wiring so it starts as soon as the ignition is switched ON, that way I can prime the fuel system if it has been setting for a period of time. I realize this is not the best situation from an accident safety standpoint, so I plan to install a F*rd inertia switch next spring. These are readily available from the salvage yards and simple to install as its just wired in series (no relays) with the fuel pump power wire. You do need to mount it in an accessible location so it can be manually reset if you accidentally trip it on a speed bump or similar impact. I plan to mount mine under the dash where I can reach from the drivers seat.

Hope this helps

[Mat M]

Thanks, hd240z!

I have been racking my brain trying to find a way to enable the pump to run when the key is turned to the ON position, while trying to include the oilsender. IIRC, there is an in-line fuse just dangling behind the radio. It's not the radio's fuse because I already took the clarion auto-reverse POS out. I do not know if that fuse is currently being used.

[hd240z]

Mat

I believe I was wrong about my car having a factory fuse holder for the fuel pump. I checked way back in my maintenance log book and found a note that I added my own fuse holder when the pump was installed.

My Clymer wiring diagram shows the fuel pump power wire is connected to the ignition power wire near the fuse panel.

The fuse behind your radio may be for the power antenna or something else. The wire color code may give you a clue. The fuel pump wire is a solid green as is the ignition wire.

[Mat M]

Thanks, hd240z, I think I was spinning my wheels.

Is that a straight tap into the ignition wire (like a 'T'?), then the fuse, and THEN spade connector to the green side of the T connector behind the radio???

[hd240z]

I will have to take another look at my car's wiring for specifics, unfortunately it is sitting in the winter storage facility away from my home, so I can't do that immediately. One of the drawbacks to keeping a Z in the Midwest.

I think the tap into the ignition wire is already existing , based on the wiring diagram from my Clymers book (maybe your green tee connector?), but I hate to confuse the issue any more by speculating without verification.

Another possible issue is that your car is a series 1 based on VIN number and mine is a series 2. I don't know if they modified the wiring harnesses during that change or not.

You should be able to verify the pump wiring by using a voltmeter or test light to see if its got power when the ignition is switched ON.

The fuse I added is not absolutely necessary as the exiting IGNITION fuse would protect the fuel pump wiring, but I didn't want a short in that wire killing the ignition too.

Good Luck

[Marty Rogan]

Greetings to all.

I have been searching/researching the installation of an electric fuel pump on my 01/71 for a few days, on this and other sites, and I have have found where and how to install the pump and to which wire it should be connected, as well as where the power should be connected on the T connector behind the pass. side of the radio.

What I have not found, and I am asking because I am a complete moron when it comes to vehicle electrical systems, is:

1) How, exactly, would one run a power line from the oil pressure sender to the T connector? Would the extra electrical load of the fuel pump inhibit the operation of the sender? Those are some small guage wires, IIRC.

2) I do not understand relays for the life of me, where would one be installed in relation to the ignition, battery and oil pressure sender?

I understand home electrical systems to some degree (multiple phasing still makes me scratch my head) but I am paraniod that the slightest mistake will make my car inoperable, and I just CAN NOT have that!

TIA!

Matt,

This is your lucky day! I just installed one on my 1/71 earlier this year. I have a wiring diagram and instructions on my work computer. It shows how to wire in a relay, an inertia switch and an oil pressure cutoff switch. Send me a PM with your email address and I can send the info to you tomorrow.

Depending on the electric pump you got, you will also need a fuel pressure regulator, if your pump puts out more than 5 PSI.

Marty

[Mat M]

Marty,

PM sent!!

[240jetjoc]

Marty,

You have another PM.

Roger

[Marty Rogan]

Well, it looks like a lot of people are interested in how to wire this up. So, I guess I will go ahead and attach the diagram that I made up. I'll warn you guys, that it is pretty crude. My drawing skills are about as bad as my electrical skills, !! I also need to give lots of credit to Escanlon who helped me figure this thing out in the first place. E took me through a crash course in "Wiring For Dummies" to figure this out.

The picture shows how the oil pressure switch and sender connections should look.

I hope this helps those that are interested in making this convertion.

Marty

Fuel_Pump_Wiring(Final).pdf

[Red-Eye]

Thanks Marty...Robert

[Mat M]

Marty, You are a scholar and a gentleman!