it's quite uncommon for fuel gauges to fluctuate quickly, because they work
on a hot wire principle. I suggest to check all connections to the gauge
thoroughly and check for poor contacts.
Furtheron the dash voltage regulator maybe faulty, but then other gauges
will do funny things too.
Cheers,
Hans '71 BGT
> -----Original Message-----
> From: Larry Colen [SMTP:lrcar@red4est.com]
> Sent: Friday, August 20, 1999 3:28 AM
> To: Wildbil923@aol.com; healeys@autox.team.net; mgs@autox.team.net
> Subject: Re: Slowing the Fuel Gauge Fluctuation on an LBC
>
> How fast is your fuel guage fluctuating? Most guages have pretty slow
> responses (see how long it takes to stabilize when you turn the car on).
> I don't know what the resistance of the sender is but I'd guess that the
> time constant with a 100microfarad capacitor would be on the order of
> tenths of seconds, far faster than the response of the guage. It would
> have the benefit of storing a lot more energy so that if something did
> go wrong that might cause an the sender to arc it would be a lot more
> likely for you (or your heirs) to collect insurance money from the
> explosion and fire.
>
> lrc
>
> On Thu, Aug 19, 1999 at 09:13:22PM -0400, Wildbil923@aol.com wrote:
> > A very knowledgable lister suggested the following means for slowing
> down the
> > fluctuation of the fuel gauge needle action on an LBC:
> >
> > >>>>>The wire in the circuit that has the fluctuating voltage is the one
>
> > running
> > from the gauge to the sender unit. Supposedly if you were to install a
> > capacitor in parallel with this circuit it would absorbe some of the
> > pulsation of the current and damp the needle on the guage. I think it
> > would call for a large electrolytic capacitor, probably 100 microfarad
> or
> > larger, with the larger capacitor doing more damping than a smaller one.
> > It could be mounted just on the back of the gauge, one wire connected to
> > the sender terminal and the other wire connected to the ground terminal.
> >
> > Keep in mind that electrolytic capacitors are polarized. If your
> > electrical system is positive earth, then ground the positive side of
> the
> > capacitor. If it's Negative earth, then ground the negative side of the
> > capacitor. If you get an electrolytic capacitor hooked up backwards it
> can
> > explode like a firecracker (usually blows one end out) and spray wax
> paper
> > and aluminum foil confettie all over the place, along with a moderate
> dose
> > of sulpheric acid (battery acid). If you actually try this, let me know
> > how it comes out.<<<<
> >
> > Has anyone tried anything like this? Any comments?
> >
> > Bill Wilkman
> > Riverside, CA
>
> --
> Rome did not create a great empire by having meetings; they did it by
>
> killing all those who opposed them.
> lrc@red4est.com http://www.red4est.com/lrc
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