Fuel level sending units

moperformance said
When the gauge quit on the Super Bee during the 05 Hot Rod Power tour, we went to radio shack and bought a cheap multimeter. unhooked the gas tank sending units wire by the drivers kick panel connector going to the dash. grabbed ground and ran the two wires between the bucket seats. My daughter (the co-pilot) would turn the meter on at fill up and write down the ohms reading. Ever so often she would read the ohms scale again and when it got near empty we would pull in and fill up. again, and again, and again, and agai..... well you get the gist of it. 4000 miles at 10 mpg= 400 gallons of (hopefully)premium gas.
I don't remember what the full and empty values were but easy to figure out and I know it's not a permenate solution.
But hope this helps.

A cheap ohms meter monitoring the sender is a very good way for these owners to verify the fault is actually in their 40 year old fuel gauge. So many of them do the same meaningless gauge tests. First off/ open/ infinite resistance is no needle movement. Second is dead short/ zero resistance gets needle to travel rapidly to the extreme full position. They assume the gauge is good while they have actually proved nothing.
Others will suggest you go to radio shack and buy resistors to test at 78, 23, and 10 ohms. This was deemed sufficient for factory engineers and for service techs 40 years ago. It really doesn't mean a whole heck of a lot though. You still don't know how the mechanical components inside the gauge are going to respond to all those other in between ohms values.
Ever wonder why this issue is always the fuel gauge and nobody ever complains about their temp gauge and/or those senders ?
The bi-metal in a temp gauge rarely gets anywhere near as hot as that in a fuel gauge. It never ever experiences those rapid temperature swings that exist in the fuel gauge operation either. Am I going the long way about saying the bimetal in a fuel gauge is fatigued and the majority of its original temperance is lost ?
ABSOLUTELY !
I gave up trying to educate the world a long time ago. They'll buy or build some fancy inline signal adjust unit and chase their failing gauges. It's just a matter of time until they realize it wasn't a set it and forget it add on.