Fuel Gauge Issue

Dana67Dart said

There might be more truth to that!

If the resistance range of the Holley sender is such that it does not provide:

10 ohms full
23 ohms 1/2 tank
73 ohms empty

Note 23 is not 1/2 of 63.

The sender provides a curve to the gauge.

That being said if your sender is providing 50 to 80 ohms due to the fuel level in the tank it could be reading empty.

As for being 0 ohms (dead short) maybe you are pinching the sender wire under certain conditions.

Click to expand...

I checked the original Holley sender and it wasn’t perfectly 10-73 but it was close to it. I figure at 39 ohms I should have slightly more than 1/2 tank. I’ve played with grounds but haven’t run a ground direct to the battery. Instructions don’t call for it but I might as well test it. I currently have it grounded to the same bolt the taillights are grounded to so I figure that should be sufficient. But with resistance to the cluster connector, I figured I was good.

I’ll have to look to see about pinched wiring. I may run a test wire to the gauge itself and see where that puts me.