1965 Cuda Gas gauge.......

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Banjoman09

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Now that my Turn Signals work fine- my next problem. I installed a new reproduction gas gauge about a month ago- never has worked right. Sometimes it comes up- sometimes it doesn't. I took it down and filled the tank today- went up to 3/4...by the time I got home it was back on empty. I even installed an extra ground wire from the frame to the tank! Any ideas? Thanks.
 
Ground the sender unit wire. Gauge should immediately go to full. If not, you have a problem with the sender.
 
1) did the previous work ?
2) did you check the sending unit ?
3) are the other gauges working ?
4) did you replace the existing one or bypass it ?
5) search these forums for "gas gauge" there are many entries.

I did the conversion to a solid state gauge voltage regulator so I have a solid 5 volt reference and replaced the sending unit and everything works fine with the old existing gauge. There are some fantastic articles on that and I just followed them.
 
1) did the previous work ?
2) did you check the sending unit ?
3) are the other gauges working ?
4) did you replace the existing one or bypass it ?
5) search these forums for "gas gauge" there are many entries.

I did the conversion to a solid state gauge voltage regulator so I have a solid 5 volt reference and replaced the sending unit and everything works fine with the old existing gauge. There are some fantastic articles on that and I just followed them.
I replaced the old sending unit- old one was not working. All gauges are working. How do I access the old forum gauge discussions? Thanks.
 
On the upper right-hand side of this screen there is a "search" text box. Type "gas gauge" and press ENTER. You can type more specific keywords also like "gauges 65 Barracuda" etc
 
I ordered another new sending unit from "Laysons Restorations"...they seem reliable but also said there are NO sending units made in the USA. I will adjust this new one so it is right(with my Ohm meter) I will have to find the specs...I did check my wire coming from the gauge and when I ground it the fuel gauge immediately goes to the right. Thanks.
 
Ground the sender unit wire. Gauge should immediately go to full. If not, you have a problem with the sender.
I received my new tank unit today-Anyone have the Ohm specs on full and empty..and is this adjustable? Thanks.
 
Yes this is adjustable. There is an empty stop and there is a full stop. Adjust these to achieve the correct readings.
 
When the tank is full the resistance of the sending unit's pot is the lowest (typically 10 ohms, float up) so that the maximum current can flow through the gauge and the needle can swing fully to the right. When it's empty the resistance is the highest (typically 73 ohms, float down) so that the minimum current can flow and the needle stays on EMPTY.

If you are reading your meter on the 1K ohm scale you're about right (0.01 X 1000 = 10 and 0.08 X 1000 = 80 ohms).

Which are?
 
It is probably true there are no sending units still made in USA. You can do better than China, though, by getting a Spectra sending unit. They are at least made on North American soil in Canada. If that's not what Laysons sells, I would not buy from them.
 
When the tank is full the resistance of the sending unit's pot is the lowest (typically 10 ohms, float up) so that the maximum current can flow through the gauge and the needle can swing fully to the right. When it's empty the resistance is the highest (typically 73 ohms, float down) so that the minimum current can flow and the needle stays on EMPTY.

If you are reading your meter on the 1K ohm scale you're about right (0.01 X 1000 = 10 and 0.08 X 1000 = 80 ohms).
Ok I'll check again- using scale 20k- screen reads .08 empty and .01 full. Thanks
 
Here you go
attachment.jpg
 
Put your meter on the lowest ohm setting way more accurate. Also shoot the continuity of the sending wire should be near zero, wiggle it also if you can can be something simple also.
 
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