Does anyone have the Fiero fuel gauge sender potentiometer specifications for the correct signal?

It looks like a previous owner has replaced the potentiometer with a non-stock unit.

Thank you for the help on this one.

Empty is 0 ohms. Full is 90 ohms.....in theory. Very few stock senders show 0 ohms any more.

Ever since I got it running, the gauge on my '88 GT was stuck quite a bit above the Full mark. I did some trouble shooting, including swapping in other spare gauges which gave the same result. I finally determined the problem was most likely the sending unit in the tank.
I dropped the tank yesterday to check it out.
The readings I am getting are 43 ohms empty, and 198 full.
So then I plugged the module 3 wire harness back into the chassis wire harness while the module assembly was still out of the tank and the float at the Empty position.
I turned on the ignition key, and for the first time the gauge needle move down to about have Half Full location. When I move the float to the Full position, is raised way above the Full mark once again.
It would be the easiest if I could get this aftermarket sending unit to work rather than replacing it, but I don't see any adjustment on it.

[This message has been edited by hdryder (edited 04-19-2015).]

Too much corrosion on the parts equals too much resistance. If you clean the metal parts up and it still reads high, you may need to find a new sender.

They can be fixed, either by replacing the potentiometer, or by sending out for repair. I repaired mine by replacing it with a Pot from an old spare sending unit.

Pots and repair can be obtained here:

http://tristarrradiator.com...Products%20Page.html

I thought the price for the Pot, or the repair, was high, but if someone has a rare sending unit then it may be an only option.

Here is another option I did.
How To - - Replace Gas / Fuel sending unit / Gauge sender with a generic one --- pics by sardonyx247

Thank you for the help.

I ordered one of these from Summit.


http://www.summitracing.com/parts/CIN-SN38

Hi sardonyx247,
Today I am working on the mods, like you did, on the Classic Instruments SN38A Tank Sender that I bought from Summit.
Everything is going well.
Thanks,
Luke

[This message has been edited by hdryder (edited 04-26-2015).]