That means you have to call it a "sink"
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| need info on fuel sending unit https://slantsix.org/forum/viewtopic.php?t=32754 |
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| Author: | apairof66s [ Fri Dec 12, 2008 6:53 am ] |
| Post subject: | need info on fuel sending unit |
I'm working on my sons 64 Dart and I need to know what ohm range I should get from the fuel sending unit. Thanks in advance for any help. Lee |
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| Author: | wjajr [ Fri Dec 12, 2008 8:03 am ] |
| Post subject: | |
Resistance from lead of sending unit to ground should read 300 ohms or less depending on amount of fuel in your tank. |
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| Author: | apairof66s [ Fri Dec 12, 2008 8:24 am ] |
| Post subject: | |
Thanks for the reply. Is 300 the highest reading ? I was thinking that 8 might be the lowest reading too. Lee |
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| Author: | wjajr [ Fri Dec 12, 2008 9:54 am ] |
| Post subject: | |
That sending unit is just a variable resistor, depending on where the float is floating will determine the resistance. I don't know what the lowest reading would be, but it would probably be a little greater than zero. Resistance is at a minimum when the tank is full, about 300 ohms bone dry. You could ground out the wire that attaches to the sending unit to simulate a full gage reading. If the gage dose not register full when grounding out its tank lead, than there is a gage problem, a poor dash ground, or possibly a dash voltage regulator malfunction. Checking the brass connections in the tank to gage wire, and making sure they are clean & sound will be helpful. Poor, or corroded connections add resistance to the circuit, and can cause false gage readings, that is, lower readings on the gage than actual. |
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| Author: | KBB_of_TMC [ Fri Dec 12, 2008 12:16 pm ] |
| Post subject: | |
I don't have my specs in front of me, but I'm fairly sure that at least from '65-up it's 10 ohms full and 77 ohms empty. Keep in mind that these weren't all the precise and so the #s can vary a bit, especially on the empty side. It's the same range for the oil and temp gauges for that vintage. |
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| Author: | apairof66s [ Sat Dec 13, 2008 9:32 am ] |
| Post subject: | |
Thanks for the replies. It turns out the float had a hole in it !!! |
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| Author: | 6shotvanner [ Sat Dec 13, 2008 10:25 am ] |
| Post subject: | |
That means you have to call it a "sink"
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