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Recommendation On Where To Buy Sending Unit #2185241 10/29/16 01:05 PM 10/29/16 01:05 PM
Joined: Jan 2004 Posts: 755 Tempe, AZ L loco340cuda OP super stock
loco340cuda OP super stock L Joined: Jan 2004 Posts: 755 Tempe, AZ	I need to buy a sending unit for my 70 Cuda, (340ci engine). The last one I bought I got from Classic Industries and it appears to be non-functional after I installed it. I verified the gauge is working properly and the tank has good ground. When measuring the resistance of the sending unit I get 18Mohm reading which says the unit is not working correctly. Given that I don't want to have to replace the unit a third time, I am looking for a recommendation on where to buy one of these that is of better quality. I understand with the exception of NOS all the aftermarket ones are not that good but I at least want to buy one that is functional and is reasonably accurate. Also, is it possible to swap out the sending unit without having to drop the tank? Last edited by loco340cuda; 10/29/16 01:06 PM. 70 Cuda 340 4 speed - now stroked to 416ci (SOLD) 2017 Mustang Shelby GT350

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2185257 10/29/16 01:24 PM 10/29/16 01:24 PM
Joined: Oct 2003 Posts: 3,379 KY USA mopargem master
mopargem master Joined: Oct 2003 Posts: 3,379 KY USA	This should work from sponsor Dixe Resto http://ebay.to/2ePrUvl 68 Polara 500...LL1 Y7 M6X 69 Hemi road runner...X9 X9 M6X 69 A12 road runner....R4 R4 M6X 69 ModTop FLORAL Super Bee...F6 M6W 70 AAR 'cuda...EW1 EW1 H4X9 71 Duster 340...FJ6 V24 L6X9 71 road runner FC7 V1X M6X9 72 Rallye Charger B5 V1W 74 'cuda 360...KB5 V1X A6X9 08 SRT Challenger #234

Re: Recommendation On Where To Buy Sending Unit [Re: mopargem] #2185293 10/29/16 02:22 PM 10/29/16 02:22 PM
Joined: Jan 2008 Posts: 2,592 None 71rm23 master
71rm23 master Joined: Jan 2008 Posts: 2,592 None	Originally Posted By mopargem This should work from sponsor Dixe Resto http://ebay.to/2ePrUvl Got my sending unit, tank, straps, gas tank pad from Randy. Good to deal with

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2185294 10/29/16 02:26 PM 10/29/16 02:26 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: Also, is it possible to swap out the sending unit without having to drop the tank? yes if the sender goes in the side of the tank (& most do) & it does on your 70 cuda. My 85 ramcharger I think I am fubared (& it is on empty) live every 24 hour block of time like it's your last day on earth

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2185362 10/29/16 04:12 PM 10/29/16 04:12 PM
Joined: Jan 2003 Posts: 3,682 South San Francisco, Ca 70sixpkrt master
70sixpkrt master Joined: Jan 2003 Posts: 3,682 South San Francisco, Ca	I went thru 3 bad sending units. They are all junk. I bought one from Kramers auto and it reads perfect. He calibrates them and makes sure they are reading right before he ships them out. http://www.kramerauto.com [img]http://www.imgur.com/hxlGUJt.gif[/img] 4-speed 3:54 Dana 13.01 @107.93 with street tires (not hooking up)

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2185371 10/29/16 04:32 PM 10/29/16 04:32 PM
Joined: Jan 2008 Posts: 2,363 Cotati, CA Dave Hall top fuel
Dave Hall top fuel Joined: Jan 2008 Posts: 2,363 Cotati, CA	I bought the 1/2" sending unit from Year One and it's great, no problems.

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2186618 10/31/16 12:44 PM 10/31/16 12:44 PM
Joined: Jun 2008 Posts: 1,822 Colorado D denfireguy top fuel
denfireguy top fuel D Joined: Jun 2008 Posts: 1,822 Colorado	Originally Posted By loco340cuda I need to buy a sending unit for my 70 Cuda, (340ci engine). The last one I bought I got from Classic Industries and it appears to be non-functional after I installed it. I verified the gauge is working properly and the tank has good ground. When measuring the resistance of the sending unit I get 18Mohm reading which says the unit is not working correctly. Given that I don't want to have to replace the unit a third time, I am looking for a recommendation on where to buy one of these that is of better quality. I understand with the exception of NOS all the aftermarket ones are not that good but I at least want to buy one that is functional and is reasonably accurate. Also, is it possible to swap out the sending unit without having to drop the tank? 81 Megohms is leakage resistance. If your ground is good, the sender is open. You probably have lower leakage resistance holding a probe in each hand. Craig 2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2186685 10/31/16 02:02 PM 10/31/16 02:02 PM
Joined: Jan 2011 Posts: 499 Brownstown, PA F FJR doc mopar
FJR doc mopar F Joined: Jan 2011 Posts: 499 Brownstown, PA	If it were my car, I would either find a NOS unit or have the original rebuilt. My aftermarket A body sending unit could not be calibrated to my gauges. I found a NOS unit at Carlisle and it needed almost no adjustment. Follow my Duster 340 restoration progress on FABO http://www.forabodiesonly.com/mopar/showthread.php?t=225784 Kevin

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2188223 11/02/16 07:31 PM 11/02/16 07:31 PM
Joined: Jun 2008 Posts: 1,822 Colorado D denfireguy top fuel
denfireguy top fuel D Joined: Jun 2008 Posts: 1,822 Colorado	Finally found one that works but it came with the entire tanks. Spectra CR8CFI fuel injection tank with sender and pump. Full is 8 ohms and full deflection of gauge. Empty is empty. First aftermarket one that had done that for this car. Craig 2014 Ram 1500 Laramie, 73 Cuda Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango Only previous Non-Mopar: Schwinn Tornado

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2188267 11/02/16 08:12 PM 11/02/16 08:12 PM
Joined: Aug 2007 Posts: 566 WA T tman mopar
tman mopar T Joined: Aug 2007 Posts: 566 WA	If yours is a 5/16, Dixies states that they have NOS ones in stock. You can change out sending unit w/o removing tank. Just remove heat shield in the way and make sure tank level is lower than the opening. You did not mention if you have a Ground strap for the sending unit to metal fuel line. It looks like this: https://www.amazon.com/Mopar-Fuel-Sending-Ground-Strap/dp/B00MG12F0Y http://www.dixierestorationparts.com/products.cfm?kys=fuel+sending+unit Last edited by tman; 11/02/16 08:14 PM.

Re: Recommendation On Where To Buy Sending Unit [Re: tman] #2188331 11/02/16 09:40 PM 11/02/16 09:40 PM
Joined: Jan 2004 Posts: 755 Tempe, AZ L loco340cuda OP super stock
loco340cuda OP super stock L Joined: Jan 2004 Posts: 755 Tempe, AZ	Thanks. I ordered the NOS one from Dixie on eBay on Saturday. Just waiting to hear from them that it actually shipped. 70 Cuda 340 4 speed - now stroked to 416ci (SOLD) 2017 Mustang Shelby GT350

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2188392 11/02/16 11:02 PM 11/02/16 11:02 PM
Joined: Jan 2004 Posts: 755 Tempe, AZ L loco340cuda OP super stock
loco340cuda OP super stock L Joined: Jan 2004 Posts: 755 Tempe, AZ	So just checked the mailbox and the sending unit was in there. I went out and measured the resistance with the float low (equivalent to empty tank) and it measured around 78ohms. When I raised the float to simulate a full tank the resistance went down to about 16 ohms at about 4/5 full and then creep back up to 78 ohms at full. I did this a bunch of times and it was fairly consistent. Then I tried it by raising the float very slowly and I could get it to read 13 ohms at full. I tried doing this repeatedly (raising it slowly) but could not always get a 13 ohms reading every time (sometimes ~20 ohms, sometimes ~30 ohms and every now and again 78 ohms). Does this sound right or do you guys think this OEM sending unit has an issue? 70 Cuda 340 4 speed - now stroked to 416ci (SOLD) 2017 Mustang Shelby GT350

Re: Recommendation On Where To Buy Sending Unit [Re: loco340cuda] #2188719 11/03/16 02:08 PM 11/03/16 02:08 PM
Joined: Apr 2010 Posts: 4,154 bethlehem pa M mikemee1331 master
mikemee1331 master M Joined: Apr 2010 Posts: 4,154 bethlehem pa	that sounds about right. a few ohms + or - doesn't make a difference.

Re: Recommendation On Where To Buy Sending Unit [Re: mikemee1331] #2188733 11/03/16 02:19 PM 11/03/16 02:19 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	that does sound like a big spread to me, maybe (hopefully) the contact pressure of the tang on the windings is varying as you manually move it out in the open & maybe it'll be different when installed with it immobile.You might with some jumpers wire it up to the blue sender wire at the tank & ground it & work it & have a helper holler what the gauge is showing. unfortunately that might be close to what you are doing now by just ohming it but I'd wanna do as much as I could before installing it & potentially having to go thru the mess of a R&R. keep us posted live every 24 hour block of time like it's your last day on earth

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