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Simple possible solution: poor grounding connection on the fuel sending
unit, and the back of the instrument cluster.
slightly less simple: check the contacts on the resistor board (which if
stock is right there in the cabin fuel tank with you), and check the ohms
on the unit by pulling it out and moving the float. It should top out
around 90 ohms.
Maybe just replace the fuel sending unit as a whole? I can't imagine that
it is more than $50.
--Miq
On Sat, Oct 18, 2025 at 9:57=E2=80=AFAM smokey <smokey@railops.com> wrote:
> For 25 years my gas gauge has worked just fine. Now the needle shakes al=
l
> the time, whether the motor is running or not. As long as the key is on.
> Any thoughts?
>
> Thanks!
> Smokey Culver, League City, TX
>
>
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<div dir=3D"ltr">Simple possible=C2=A0solution:=C2=A0 poor grounding connec=
tion on the fuel sending unit, and the back of the instrument cluster.<div>=
<br></div><div>slightly less simple:=C2=A0 check the contacts on the resist=
or board (which if stock is right there in the cabin fuel tank with you), a=
nd check the ohms on the unit by pulling it out and moving the float.=C2=A0=
It should top out around 90 ohms.</div><div><br></div><div>Maybe just repl=
ace the fuel sending unit as a whole?=C2=A0 I can't imagine that it is =
more=C2=A0than $50.</div><div><br></div><div>=C2=A0 --Miq</div><div><br></d=
iv><div><br></div></div><br><div class=3D"gmail_quote gmail_quote_container=
"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Oct 18, 2025 at 9:57=E2=80=
=AFAM smokey <<a href=3D"mailto:smokey@railops.com";>smokey@railops.com</=
a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><d=
iv id=3D"m_2953520354205031081edo-message"><div><div style=3D"font-size:16p=
x">For 25 years my gas gauge has worked just fine.=C2=A0 Now the needle sha=
kes all the time, whether the motor is running or not.=C2=A0 As long as the=
key is on.=C2=A0 Any thoughts?</div><div style=3D"font-size:16px"><br></di=
v><div style=3D"font-size:16px">Thanks!</div><div style=3D"font-size:16px">=
Smokey Culver, League City, TX</div><div style=3D"font-size:16px"><br></div=
><div style=3D"font-size:16px"><br></div><div id=3D"m_2953520354205031081ed=
o-signature"></div></div></div>____________________________________________=
___<br>
<br>
<a href=3D"mailto:Oletrucks@autox.team.net"; target=3D"_blank">Oletrucks@aut=
ox.team.net</a><br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/oletrucks"; rel=3D"norefer=
rer" target=3D"_blank">http://www.team.net/pipermail/oletrucks</a><br>
<br>
cks/miq@bigllama.com" rel=3D"noreferrer" target=3D"_blank">http://autox.tea=
m.net/mailman/options/oletrucks/miq@bigllama.com</a><br>
</blockquote></div>
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