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Gas Gauge Problem....

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Old Jul 3, 2007 | 04:40 PM
  #1  
takeoutexodus's Avatar
takeoutexodus
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Default Gas Gauge Problem....

When I fill up at the gas station .. It only goes up to 1/2 tank on the gauge.

and it works just fine all the way down ...

whats wrong?

how can i fix it ?

Old Jul 3, 2007 | 04:51 PM
  #2  
mySAVIOReigns's Avatar
mySAVIOReigns
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Joined: Feb 2007
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From: Mansfield, Texas
Default RE: Gas Gauge Problem....

Maybe your sender is turned crooked - mine is doing the same thing, but I think that may be the problem with mine. I wish I knew which orientation was correct
Old Jul 3, 2007 | 04:57 PM
  #3  
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66GTKFB
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Default RE: Gas Gauge Problem....

What year car?
When did this start?
Did you do anything under the dash?

In most cases, it's the sender. The tests are simple.
With the ignition on (or on aux so you get an indication on the gauge):
- Remove the push-on connector to the sending unit on the tank. The gauge should drop to empty.
- With a home made jumper wire that will fit into the connector you just pulled off and an alligator clip on the other end of the wire, short out the sender wire to ground. The gauge should go to full. If it does, it's the sender. If it goes to 1/2 tank, it's the gauge.
Jim
Old Jul 3, 2007 | 05:01 PM
  #4  
takeoutexodus's Avatar
takeoutexodus
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Default RE: Gas Gauge Problem....

1965
this started about 3 weeks ago.
havent done any work under the dash ..
so it just has me confused

Old Jul 3, 2007 | 05:10 PM
  #5  
restomod66's Avatar
restomod66
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Joined: Aug 2006
Posts: 691
From: RI
Default RE: Gas Gauge Problem....

66GTKFB,

Just curious, Do you know offhand what type of connector is on the sender?? Place jumper wire into the connector off the sending unit and ground it out by clipping the alligator clip to a ground. Just what to make sure. I think I have a fuel gauge problem also,
Old Jul 3, 2007 | 05:16 PM
  #6  
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jlg2002
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Joined: Jun 2006
Posts: 1,483
From: Fontana, California
Default RE: Gas Gauge Problem....

ORIGINAL: 66GTKFB

What year car?
When did this start?
Did you do anything under the dash?

In most cases, it's the sender. The tests are simple.
With the ignition on (or on aux so you get an indication on the gauge):
- Remove the push-on connector to the sending unit on the tank. The gauge should drop to empty.
- With a home made jumper wire that will fit into the connector you just pulled off and an alligator clip on the other end of the wire, short out the sender wire to ground. The gauge should go to full. If it does, it's the sender. If it goes to 1/2 tank, it's the gauge.
Jim
Great advice- tank units are resistive and work by varying the resistance in relationship to the fuel in the tank by a float and arm mechanism.Another possibility to consider once you've determined if it's the guage or the tank unit, is that the float is asorbing fuel and its too heavy to go all the way to the top after a fillup - shake it. There should be no sloshing sound.
PS it's not repairable if its leaking ( it's like a little bomb)
Old Jul 3, 2007 | 05:21 PM
  #7  
66GTKFB's Avatar
66GTKFB
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Default RE: Gas Gauge Problem....

I think it's a number 10 stud on the sender. If you have a3 or 4 foot long jumper with alligator clips on both ends, that will make it a bunch easier to hook up to a 10-32 screw to shove into the wire end.
Jim
Old Jul 3, 2007 | 05:23 PM
  #8  
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restomod66
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Posts: 691
From: RI
Default RE: Gas Gauge Problem....

Thanks Jim!!
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