Re: Need help w/fuel gauge

[Douglas Henry <dhenry@u.washington.edu>]

On Mon, 9 Dec 1996, Hanson, Todd wrote:

> 
>      I am having a minor problem with my T-3 fuel gauge. When the tank is 
>      over half full of gas, the fuel gauge displays the normal reading. 
>      However, when the tank gets down to about half full, the needle jumps 
>      back and forth a lot. I tried replacing the fuel sender with one out 
>      of another car (same year) with no change. I assume it is the fuel 
>      gauge or the cable. How do I test these? Thanks in advance for your 
>      help.
>      
>      thanson@frost.com
> 
Todd:

I had a similar problem with my '71 Square.  It turned out to be poor
grounding of the sender.  I had taken out my tank and had neglected to do
a proper final tightening of the 4 screws that hold the edges of the tank
in place.  The ground actually goes out along the surface of the tank and
you need good contact with the car chassis.  Try getting a wire with
alligator clips at each end and make a connection from one of the
bolts on the sender with one of the grounding screws inside the front
trunk area and try driving it around and see if it goes away.  

Someone else on the list may have a better technique to try.

Hope this helps,

Doug H.