Hey guys- I have a '67 and the gas gauge shows way past full- it doesn't react or change when the ignition is on. I had seen someone's post saying it was most likely a ground issue, and they had posted an image to help, but I can't find that link anywhere, and don't know where to start looking for the ground issue. Little help? Thanks in advance

This one?

https://firstgenfirebird.org/forums...e/re-help-with-fuel-gage.html#Post327994

Jim, thanks- that will certainly help, but the one I was thinking about said something like if it showed on E then the issue was at the sending unit, but if it showed way past Full then it was a problem on the gauge side with a poor ground there.

Could be a bad ground anywhere in the circuit. Usually at the cluster.

I think the problem causing it to read full is the ground from the sender to the frame.

I agree. I would try to install a temporary ground wire from the sender, just to see if that would make the gauge work as intended.