Fuel Guage Goes Up Then Partly Fades -- 72 Swinger

Lots of good info in this thread.

I looked at your video and that's quite a swing. I did all the tests mentioned here with mine and found my dash gauge to be inaccurate. However I did try a 12 volt fuel gauge hooked up to the sender and it was consistent and accurate. Mine is a problem when it gets down to 1/4 tank. So i've learned to live with it and fill up when it gets there. Hope you have better results.