Fuel Gauge OHMS for 550EFF?

[Colorado85gs550]

http://www.sfxperformance.com/parts/AUM1315.htm

but this gauge says 0 empty/90 full........

I'm confused.....

could I wire this backwards?

[twiggy2cents]

not really resistance is resistance. It is not biased to direction

[Colorado85gs550]

http://www.loperspeed.com/khxc/index.php?app=ccp0&ns=prodshow&ref=1470

[Colorado85gs550]

not really resistance is resistance. It is not biased to direction

but would it be 2 wire or 1 wire?

[Colorado85gs550]

O.K.

I've figured out part of this...........you were right with the fuel float is "the resistor"....the picture shows that if you disconnect the 2 wires going to the tank, you need to connect either a 6 ohm OR 97 ohm resistor to test the gauge..........

so if I hook the gauge up in the links...........it should be 2 wires.....If I hook the wires backwards at the gauge OR at the tank shouldn't the 0/90 gauge work?

[twiggy2cents]

think of the resistance as a bottle neck, either way you go there is still resistance

[Colorado85gs550]

so are we saying this gauge won't work?

[twiggy2cents]

unless you could flip the resistor strip on the fuel gauge

[Colorado85gs550]

I might be stuck with disassembly of the stock gauges and pulling the fuel gauge out and making a custom gauge out of it...................

[twiggy2cents]

does it not look feasable to flip the resistor contacts on the sender?

[Colorado85gs550]

I don't know what they look like at the sending unit.........

[Colorado85gs550]

does it not look feasable to flip the resistor contacts on the sender?

I thought this is what I was asking before.......

If it would be possible to switch the wires.....

[twiggy2cents]

no not the wires the whole contact so the 0 ohm is on top instead of bottom (or vise versa) not switching wires, you have to physically make the float touch the 0 when full and 90 when out or vise versa

[Colorado85gs550]

but if there are 2 wires coming out of the tank, wouldn't you think that one would be attached to the 6 ohm resistor contact and the other attached to the 97 ohm resistor contact?

so that if I connect the wire for the 6 ohm contact to the wire for the 90 ohm in the gauge and vice versa I should get what I'm looking for........

[twiggy2cents]

your fuel gauge isnt a resistor, it is a variable resistor offically called a potentiometer or POT This is what the fuel gauge is esentially but remove the ground and you have your circuit. There is no set resistance the "middle" of the circuit has a bunch of contacts in a line, all with different increasing resistances that as the float arm moves it increases or decreases.

I hope this helps, i am off to bed.

If your still confused i can continue explanations and try to find some better pictures. Or just google search how a fuel sender works, or more info on poteniometers

Good luck