You lost me.
You originally stated that with the key on, the gauge goes to full.
Now, with a good ground, "It didn't change anything and the needle just stays at E."
Since it no longer goes to full with the key on, is that not a "change"?
If it reads E with the key on, either the tank is empty or nearly so, or you have a bad sending unit.
Carl
I have a brand new sending unit and when the ignition is on the needles jumps to E. So I assume it is getting power, and I ran a test ground to check if that was the problem and still the needle staying at E.
With the ignition off, the needle drops like should. Really hoping its not the gauge itself but the wires between sending unit and gauge.
