Fuel sending unit issues?

[forcefed86]

Been running e85 for a couple years now. Last month my fuel gauge started acting odd. It will read full when I fill the tank. Then it drops to 1/16 away from full and just hangs there no matter how much fuel is in the tank.

I figured the sending unit was trashed from the ethanol and bought another hangar. I tested the hangar before installing it moving the float and watching the gauge. It worked. Installed the hangar and it does the same thing.

I went and tested my old unit. it works fine as well, just not when bolted to the tank. I'm assuming somehow the signal wire is grounding on the tank? Anyone have this issues before?

If I check for continuity between the sending wire and ground I should have nothing correct? As hat wire shoudl go directly to the gauge?

thanks

 

[2fastTSi]

If it grounded out, I would think the gauge would read completely empty. Is there any corrosion on the contacts?

 

[forcefed86]

If it grounded out, I would think the gauge would read completely empty. Is there any corrosion on the contacts?

Contacts are fine. As I said it works fine when the wireig is hooked up but the hangar assy isn't installed. When the wires are "open" the gauge goes to E. I think if its grounded its full. (not 100% sure of that though)