Fuel sending unit ohms

[Reddog929]

Does anyone know what ohms the fuel sending unit is at full and empty? Installing ultra light guage 0-90 ohms. 1970 240z

Any help would be great.

[GILDIA]

I read somewhere 0 omhs is full on the 240z 72

[Nissanman]

On my '73, the FULL reading is ~65ohm, EMPTY is ~135ohm.

There is a small collar held in place with a set screw which you can adjust to vary those values.

[Reddog929]

Thanks. I bought the Autometer guage from MSA and it works but I cannot use it. It reads full when full but after 54miles its on half tank. 85 miles its on .5. At 200miles it's on E. MSA said it would work and I guess it does but it's not usefull. Any ideas on how to fix this?

[ph240]

Reddog,

look at the Hybird Z >techinical>Engine Components>Ignition and Electrical, " How to make autometer fuel gauge read properly" back on 11-17-2007 smoorenc gives a detailed post on this problem. I have not tried it yet but it makes sense.

I am also looking at using Autometer or VDO gauges, but am still working on sheetmetal and rust repair.

[Curtis240Z]

Full = 10 ohms

Empty = 90 ohms