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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
Joined: Dec 2005 Posts: 2,890 Bowling Green KY / Nashville, ... 300by500 OP master
300by500 OP master Joined: Dec 2005 Posts: 2,890 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
Joined: Sep 2005 Posts: 12,481 Chino Valley RodStRace I Live Here
RodStRace I Live Here Joined: Sep 2005 Posts: 12,481 Chino Valley	http://www.stewartwarner.com/Tech/faqSc.html

Re: Ohm range for Mopar fuel gauge sending units? [Re: RodStRace] #95642 07/27/08 07:47 PM 07/27/08 07:47 PM
Joined: May 2005 Posts: 4,956 Florida BDW master
BDW master Joined: May 2005 Posts: 4,956 Florida	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
Joined: Jan 2003 Posts: 1,482 Lake Orion, MI goldduster318 pro stock
goldduster318 pro stock Joined: Jan 2003 Posts: 1,482 Lake Orion, MI	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: 2,890 Bowling Green KY / Nashville, ... 300by500 OP master
300by500 OP master Joined: Dec 2005 Posts: 2,890 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
Joined: Sep 2003 Posts: 1,168 Vancouver, WA MoparMarq super stock
MoparMarq super stock Joined: Sep 2003 Posts: 1,168 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
A Anonymous Unregistered
Anonymous Unregistered A	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 super street
hydro super street Joined: Jan 2003 Posts: 514 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
Joined: Nov 2007 Posts: 103 Tampa, FL S Saint Crispan member
Saint Crispan member S Joined: Nov 2007 Posts: 103 Tampa, FL	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 super street
hydro super street Joined: Jan 2003 Posts: 514 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
Joined: Oct 2005 Posts: 210 Florida ddartdude enthusiast
ddartdude enthusiast Joined: Oct 2005 Posts: 210 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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