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12-01-2008, 11:35 PM | #1 |
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Join Date: Jan 2005
Location: New Mexico
Posts: 22
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69 chevy fuel gauge problem with a fuel cell
Hello all, I have a fuel cell that has a Chevy 0-90 ohms sending unit but my gas gauge reads 1/8 with the tank full or empty the sending unit is currently reading ~48.5 ohms with a half a tank right now. And the float is not leaking. Below is a list of things I’ve checked. Any ideas would be greatly appreciated.
1, With the ignition "on" and the sending unit power lead disconnected the gauge reads past full. 2. With the ignition "on" and the sending unit power lead grounded it reads empty. 3, I removed the sending unit from the fuel cell and with the float at the bottom it reads 2.2 ohms and with it at the top it reads 89.8 ohms. I’m reading ~8 VDC at the sending unit power lead as well at the fuel gauge terminal at the fuse box. Also does any one know what the G and the S stand for on the sending unit terminals? Please help!!!! With any ideas. Thank you |
12-02-2008, 12:26 AM | #2 |
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Join Date: Sep 2006
Location: Shelley Idaho
Posts: 876
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Re: 69 chevy fuel gauge problem with a fuel cell
You never said if you have the fuel cell sending unit grounded. With the guage going past full then to empty I'd say the wiring and guage are working, and the sending unit seems to be working with the ohms you state. Is the fuel cell made of plastic? If so it isn't a very good ground path, I'd hook a wire somewhere on the sending unit and ground it and see what happens.
My guess is the the G is ground and the S is signal (hot).
__________________
1970 Nova 327/T5 (my 1st car) 1971 K-20 350/350/205 (winter DD) 1953 GMC Suburban 1968 Chevy Bel Air 1976 Chev C-10 1972 Skylark (suncoupe) 1 of 3943 made Last edited by sweet70beast; 12-02-2008 at 12:27 AM. |
12-02-2008, 12:38 AM | #3 |
Registered User
Join Date: Jan 2005
Location: New Mexico
Posts: 22
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Re: 69 chevy fuel gauge problem with a fuel cell
Thank you for the reply,
Sorry I forgot the mention the ground, I do have a ground wire from the sending unit to the frame but yes the cell is plastic. |
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