single tank setup help

[txchainsawgogi]

.I've had it withmy useless duel tanks! After replacing my fuel sending unit (and still not getting a good readout) I noticed several wires that were torn up. Also my tanks aren't even connnected to each other.

Anyways I've decided to narrow it down to just my driver side tank.

What are the procedures for doing so? Running one line from the fuel pump to the tank... what else?


Ill drop the other tank and i'd like to do away with the selector switch wiring. I just don't want to leave out an important wire or something

[Grim 82]

You'll need a feed and a return line from the tank to the pump, and a vent from the tank to the vacuum can/ vented cap. You'll need the wire to the remaining sending unit and the ground wire for the gauge to read. 3 hoses, 2 wires.

[txchainsawgogi]

Right now the tank only has one hose going to it! Could that be why its acting weird?

[Grim 82]

How many fittings are on the sending unit, and how many on the fuel pump? All of them that I have seen have a feed and a return line.

[txchainsawgogi]

The new one has three fittings, but the original only had two. I have the two unused ones capped off, as that's how the one I took off was.

[Captkaos]

The tanks were never connected to each other, that is what the selector switch does, switch from one to the other.
The switch should be labeled, it is hooked up right?
Should be 2 feed, 2 return and 2 vent generally speaking.  Does the switch on the dash work, are you gettting power to the valve?

To eliminate it, you just need to extend the 1 feed, and return line to the tank you plan to keep.

[txchainsawgogi]

I'm trying to figure out what all the original owner did to the fuel system,,, but it might be easier just to start from scratch.

The tank only has a single hose to it, and two wires going to it. Even with the other two hoses missing shouldn't it still give me a good reading? Might the wire going to the top of the fuel sending unit have a short in it I can't see?

[txchainsawgogi]

Hmm...how does the return line work? It currently doesn't seem to have one!

[Grim 82]

The fuel pump pulls fuel from the tank through the feed line, and the excess fuel goes back to the tank with the return line. How many fittings on the fuel pump?

[txchainsawgogi]

I'm not sure...

[txchainsawgogi]

Alright...my fuel pump only has an inlet and an outlet to the carb. My fuel selectorvalve has already been bypassed. I assume I can remove the wires going to it, keeping the good tank's ground and fuel sending unit wire. I want to try and cut off the unused wires as close to the source as possible,but can't find a wiring diagram of them.

I'm not sure how to hook up a return fuel lineif my pump only has an inlet and outlet.
 My clymer's manual is no help.

[Grim 82]

I'm quite familiar with my 82, and I have replaced almost every component on it to get my dual tanks working, but I've never seen a setup like you describe, and I'm not sure why there is no return line. Somebody else may have to chime in to help you out.
So you have only one line going to the pump, and from there one line going to the carb? How many fittings on the sending unit, and how many fittings on the valve? All of the pumps I have messed with have a feed, return, and a line to the carb. My selector valve has a feed and a return from each tank, and then a feed and return towards the pump. 3 fittings on the pump, 6 fittings on the valve. It's possible that's the way the older models are, or else you might not have the right parts. I'm not sure...

[txchainsawgogi]

Haha the way things are on my truck I wouldn't be surprised if its all mismatched parts. I know the bottom of the pump has just two fittings. The tank selector valve has three, but is not being used.

So the way its set up right now, all the wiring is still in place but as far as fuel lines...I've got one feed coming off a sending unit with three fittings to the pump,from the pump to the carb...no return fitting. .

Haha weird.

I'm going to remove the wires to the tank select valve, and drop the bad tank. Will removing the wires interfere with the fuel sending unit power wire or ground?

[txchainsawgogi]

So I've done away with the second (passenger)tank and the fuel selector valve. I replaced the fuel sending unit and cleaned up the wiring. My gas gauge is still reading screwy. Anyways I unhooked the tank select switch from its harness and the reading jumped past full and stayed there.

How do I remove the switch and its wiring? I want just the wire coming from my good tank to my gauge...maybe that will fix the faulty reading.

[txchainsawgogi]

No one? What about afternarket gauge/ sending unit setups? I really want to know how much is in my tank!