My 84's gauge responds slowly, I've noticed.  There must be some kind of a
dampner in the system keeping the gauge from bouncing around or something.
After cornering right or left, the gauge reading can vary as much as 1/3
tank, depending on how long ago the corner was, etc etc.  So it happens that
sometimes I look at the gauge and see 1/2 tank, then look again in a minute
and see half way down the red..look again and see 1/4 tank...Overall, it's
pretty accurate and consistent but I have to be aware of long sweeping
corners or driving on a tilted road bed changes the reading.
  I much prefer using my odo to track my 'miles run on current tankfull'  I
get about 350-375 miles per tank but I fill when I have done 300 miles to
keep from sucking up the dregs or being stranded.  I use a figure of 75miles
per mark on the gauge face...1 mark 'down'  from full=75 miles run..Top of
the red zone = 75 miles remaining till I must fuel up.
  Don Hanson

On Tue, Oct 20, 2009 at 7:25 AM, W Monk <billmonk@gmail.com> wrote:

> On Mon, Oct 19, 2009 at 8:29 PM, Dave Mcneely <mcneely4@cox.net> wrote:
>
> > But, he said he put 16.1 gallons of fuel into the tank.   That indicates
> > that the tank is not damaged -- it holds what the spec says it holds.
> >
> If the tank has a problem where vacumn is trying to collapse it. It should
> still be able to be
> filled up. Between opening up the cap and letting the vacumn off. Then the
> weight of
> 16.1 gallons gas return to its normal size. If the tank is damaged from
> someone lifting
> up on it or what ever. Like Dave's tank it won't read right depending on
> where the damage
> is and the extent of the damage.
> My gauge on my old van once when I ran it almost out of gas got stuck. It
> didn't move
> until I filled the tank up as much as possible. Then while driving down a
> rough road it
> shook loose and starting reading correctly.
> I'd carry a gallon or so of gas with me when the gauge get lower and test
> it
> again. See how far you can drive and where the needle reads. That way  you
> will know if its a glitch or
> something you will have to fix. If money and time is tight just use the
> odometer. Sounds
> like you watch the odometer already.
>
> B.
>