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Fuel line to sending unit ground jumper
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LD3 Greg
Posted 2014-08-15 12:18 PM (#453026)
Subject: Fuel line to sending unit ground jumper


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This was discussed a while ago but I couldn't find the jumper at that time. Here it is. It clamps onto the fuel line jumps across the rubber junction tube and then clamps to the stub fuel line in the sending unit. I've seen these on 57/58 cars. Maybe used for many others?.
Greg



(image.jpg)



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Attachments image.jpg (202KB - 132 downloads)
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d500neil
Posted 2014-08-15 6:12 PM (#453056 - in reply to #453026)
Subject: Re: Fuel line to sending unit ground jumper



Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

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What would be the purpose or goal of using this guy?

The fuel pump is mechanical.

Would the rubber fuel 'pig-tail' section act as some sort of electrical insulator, along the fuel line...as well as serving as a simple disconnect
fixture for the fuel line system?


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LD3 Greg
Posted 2014-08-15 7:15 PM (#453064 - in reply to #453056)
Subject: Re: Fuel line to sending unit ground jumper


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The sending unit/fuel tank must be grounded for the gauge to work. There must have been cases where the tank mounting straps (somehow) didn't completely ground the tank, or maybe did so intermittently, or maybe introduced some resistance in the circuit which relies on resistance to accurately gauge the fuel level. Whatever the reason the factory used them. They were a spring steel so rusted quickly. Most I found were rusted badly.

The fuel line along the frame was well grounded by its metal clips. This simply gave a secure ground connection between tank and frame by bridging over the rubber tube.
Greg

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b5rt
Posted 2014-08-15 7:17 PM (#453066 - in reply to #453026)
Subject: Re: Fuel line to sending unit ground jumper



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The aftermarket has made reproductions for later A,B and E bodies.
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StillOutThere
Posted 2014-08-15 9:52 PM (#453076 - in reply to #453026)
Subject: Re: Fuel line to sending unit ground jumper



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Yes, used for many years. My '69 Dodge still has one of these. Readily available. As stated, needed for full ground. That's Chrysler engineering for ya.
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57plybel
Posted 2014-08-16 3:06 AM (#453110 - in reply to #453026)
Subject: RE: Fuel line to sending unit ground jumper



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Thanks for the pic Greg !  Much appreciated.

 

I made a jumper wire after reco-ing my old tank but had no idea what it should look like .

 

 

Colin

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christine-lover
Posted 2014-08-17 6:49 PM (#453333 - in reply to #453110)
Subject: Re: Fuel line to sending unit ground jumper



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Didn't realize the late 50s Mopars used this, must really have been a part that did not survive. How long is this piece?
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ttotired
Posted 2014-08-17 7:21 PM (#453336 - in reply to #453026)
Subject: Re: Fuel line to sending unit ground jumper



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Heres a link to vans that have it, fuel tanks and senders as well

http://www.ebay.com/itm/Mopar-Gas-Fuel-Tank-Sending-Unit-Ground-Str...

valley vintage have it as well, but its more expencive from them

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LD3 Greg
Posted 2014-08-17 10:33 PM (#453362 - in reply to #453333)
Subject: Re: Fuel line to sending unit ground jumper


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christine-lover - 2014-08-17 6:49 PM

Didn't realize the late 50s Mopars used this, must really have been a part that did not survive. How long is this piece?


About 8" Matt.

I imagine that they would have only been required when the car was very new. Surely, with the weight of a tank full of gas and road vibration the straps would soon cut into the tank well enough to ground the tank properly.
Greg
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