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Ohm range for Mopar fuel gauge sending units? #95640
07/27/08 05:08 PM
07/27/08 05:08 PM
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Bowling Green KY / Nashville, ...
300by500 Offline OP
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300by500  Offline OP
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Bowling Green KY / Nashville, ...
I'm looking for an aftermarket fuel level gauge, but I need to know what the ohm range should be for it to work in my '69 Barracuda. Anyone know?

Re: Ohm range for Mopar fuel gauge sending units? [Re: 300by500] #95641
07/27/08 05:47 PM
07/27/08 05:47 PM
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Chino Valley
RodStRace Offline
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Chino Valley

Re: Ohm range for Mopar fuel gauge sending units? [Re: RodStRace] #95642
07/27/08 07:47 PM
07/27/08 07:47 PM
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Florida
BDW Online content
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I always thought 5-10 ohms was the low side.

0-2 ohms would certainly explain why my 5V solid state version regulator couldn't supply enough current.

5V/1ohm = 5amps!

Re: Ohm range for Mopar fuel gauge sending units? [Re: BDW] #95643
07/27/08 07:58 PM
07/27/08 07:58 PM
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Lake Orion, MI
goldduster318 Offline
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Autometer claims 73 ohms empty, 10 ohms full


'70 Duster 470hp 340/T56 Magnum/8 3/4 3.23 Sure-Grip
Re: Ohm range for Mopar fuel gauge sending units? [Re: goldduster318] #95644
07/27/08 08:15 PM
07/27/08 08:15 PM
Joined: Dec 2005
Posts: 2,876
Bowling Green KY / Nashville, ...
300by500 Offline OP
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Bowling Green KY / Nashville, ...
Quote:

Autometer claims 73 ohms empty, 10 ohms full




Yep.
http://store.summitracing.com/partdetail...mp;autoview=sku

Thanks for the help, y'all!

Re: Ohm range for Mopar fuel gauge sending units? [Re: 300by500] #95645
07/27/08 11:17 PM
07/27/08 11:17 PM
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Vancouver, WA
MoparMarq Offline
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Vancouver, WA
Moparaction.com might have some more info, but IIRC, then sending units in Mopars for fuel, oil, and temp were supposed to have 10 ohms for top of the scale, and 90 ohms for bottom of the scale.

Others more knowledgeable may chime in.

Keep us posted and pic'd on the Dakota junction box install...

-Marq

Re: Ohm range for Mopar fuel gauge sending units? [Re: MoparMarq] #95646
07/28/08 07:18 AM
07/28/08 07:18 AM

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Quote:

Moparaction.com might have some more info, but IIRC, then sending units in Mopars for fuel, oil, and temp were supposed to have 10 ohms for top of the scale, and 90 ohms for bottom of the scale.

Others more knowledgeable may chime in.

Keep us posted and pic'd on the Dakota junction box install...

-Marq




nope, its 10 and 73 ohms. the new fuel sending units they are selling everywhere measure 10 and 90 though....

Re: Ohm range for Mopar fuel gauge sending units? #95647
07/28/08 09:55 AM
07/28/08 09:55 AM
Joined: Jan 2003
Posts: 514
Buffalo, MN
hydro Offline
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Buffalo, MN
Yup, Its "10 to 73" but that's not all. The range is not linear across the sweep and the top and botton resistance can cause different results with different gauges. I have a fuel cell with the aftermarket sender (tube type) and it is nowhere near accurate. I'm on my 4th try at geting this thing re-calibrated so that the gauge reads somewhere near how much fuel is actually in the tank.

Re: Ohm range for Mopar fuel gauge sending units? [Re: hydro] #95648
07/28/08 12:47 PM
07/28/08 12:47 PM
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Posts: 103
Tampa, FL
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Saint Crispan Offline
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Well, you could always do it the hard way...

Put a gallon in, mark a line...put a gallon in...mark a line...


Might be long and tedious but durned accurate!

Re: Ohm range for Mopar fuel gauge sending units? [Re: Saint Crispan] #95649
07/28/08 03:06 PM
07/28/08 03:06 PM
Joined: Jan 2003
Posts: 514
Buffalo, MN
hydro Offline
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Buffalo, MN
With the linear resistance sender a gallon can sweep the instrument panel gauge almost 1/4 tank!

Re: Ohm range for Mopar fuel gauge sending units? [Re: hydro] #95650
07/28/08 05:59 PM
07/28/08 05:59 PM
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Posts: 210
Florida
ddartdude Offline
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Florida
Just checked the Miller C-3826 gauge checking tool and it's ------
L = 73.7 Ohms
M = 23.0 Ohms
H = 10.2 Ohms

M would be 1/2 a tank of gas.







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