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  #41  
Old 07-10-2018, 01:29 PM
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As I explained last night, where my wire goes into the take there is a black rubbery substance or some soft substance, I assume I need to pull that out to get to the top of the sending unit which will not hurt anything, just expose the wire connection to the sending unit. Has anyone seen this before, will I need to put the same thing back in when I put another sending unit (I am putting my money on that being my issue when I get home and test the wires with a new wire).
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  #42  
Old 07-10-2018, 01:52 PM
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That was just a sealer to prevent water from getting into the unit. Usually it's soft enough where you can reuse it. If not rope caulk or something similar will work just fine.

John
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  #43  
Old 07-10-2018, 06:17 PM
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I disconnected the wire from gauge/harness from the wire going into the tank. Put a wire between them, same result, stays at 1\4 level.
I plugged the wires back up and grounded at the place where the wire goes into the tank (I removed some of the black goo to get a good clean shiny metal surface) and grounded to a good place in truck, several places to confirm same results, every time the gauge pegged out to full.
I am thinking bad sending unit.
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  #44  
Old 07-10-2018, 06:20 PM
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just for grins, the harness from the guage that comes into the trunk on the drivers side, I giggled it, moved it around, so see if maybe a short was there, nothing changed, so I guess wires are good? I looked at them closely, it all looks nice and clean, I pulled some of the orig factory covering off of them and all seemed in great shape. Nothing pinched or the like that would make you think could be an issue.
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Last edited by YellowRose : 07-10-2018 at 06:26 PM. Reason: Modified wording...
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  #45  
Old 07-10-2018, 06:21 PM
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Quote:
Originally Posted by blue62tbird View Post
I disconnected the wire from gauge/harness from the wire going into the tank. Put a wire between them, same result, stays at 1\4 level.
I plugged the wires back up and grounded at the place where the wire goes into the tank (I removed some of the black goo to get a good clean shiny metal surface) and grounded to a good place in truck, several places to confirm same results, every time the gauge pegged out to full.
I am thinking bad sending unit.
It sounds like you've done everything right to prove that the sender is the problem. Before you buy a new one I would remove the old sender and check the float. If it's loaded with gas you may not need a whole new sender, just a new float.

John
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  #46  
Old 07-10-2018, 06:35 PM
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If the whole unit is out, bad float or not I may as well replace it since it does not cost much money.
I could have swore it has been replaced.
I have good records back to 1980 on it, seems so recent but then I recall the car is from 62.
But then again that is a ways back, ha ha ha.

Thanks for your help and sorry again for the frustration last night.
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  #47  
Old 07-10-2018, 06:39 PM
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Quote:
Originally Posted by blue62tbird View Post
Thanks for your help and sorry again for the frustration last night.
There was no frustration at all on my part. I was just sitting in front of my computer with the A/C on. You're the one doing all the work.

John
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  #48  
Old 07-10-2018, 06:57 PM
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You thought I was working on the car at one point when I was in the AC also. ha ha ha
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  #49  
Old 07-11-2018, 08:15 AM
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Looks like there are two diff types of floats, metal and plastic??? Is the metal the best to get?
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  #50  
Old 07-11-2018, 08:30 AM
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Default Fuel tank access

Tim, since I had a plastic float that was full of gas when I pulled it out years ago, you may want to consider the metal one... Not only was it full of gas but after decades of being in that gas, the rheostat in the fuel sending unit was corroded, so I put a new unit in and was done with it.
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