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Fuel Gauge Doesn't Drop Below 1/2
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joeys61
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Joined: March 10, 2020
Posts: 8

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PostPosted: Sat Jun 12, 2021 8:25 am    Post subject: Fuel Gauge Doesn't Drop Below 1/2 Reply with quote

Hey everyone,
I've been having this issue with my fuel guage on my 73 super where it doesn't drop below 1/2 full. When I fill up it goes to full just fine and drops steadily as it should but it rarely goes below 1/2. When it does go below half full it shoots right back to 1/2 within minutes. Occasionally while I'm driving the gauge drops to empty and then goes right back to 1/2 in a matter of seconds. The sending unit is relatively new, since my tank and sending unit were replaced maybe 5 years ago? So I'm thinking it's the gauge itself that's messed up. What do you guys think?

Thanks! Smile
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Cusser
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Joined: October 02, 2006
Posts: 31319
Location: Hot Arizona
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PostPosted: Sat Jun 12, 2021 11:28 am    Post subject: Re: Fuel Gauge Doesn't Drop Below 1/2 Reply with quote

joeys61 wrote:
The sending unit is relatively new, since my tank and sending unit were replaced maybe 5 years ago? So I'm thinking it's the gauge itself that's messed up. What do you guys think

I think most likely suspect is the sending unit.
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Starbucket
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Joined: April 30, 2007
Posts: 4018
Location: WA
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PostPosted: Sat Jun 12, 2021 11:35 am    Post subject: Re: Fuel Gauge Doesn't Drop Below 1/2 Reply with quote

Try running a ground line from sending unit screw to gage ground, aftermarket sending units and gages need to be grounded together.
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