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When full fuel guage stays on empty till some has been used

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Posted on Jan 02, 2017

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SOURCE: I got a 2001 Chevy Venture and fuel gauge always stays on full

The problem is in the fuel sender unit in the tank. It sounds like the float part of the sender unit is binding when it's at the top (when tank is full) and hangs up there till it falls back down when tank is near empty. It will likely have to come out to be checked, fixed, or replaced. Good luck.

Posted on Apr 12, 2012

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Gas gauge 2001 pontiac aztek stays on full then goes to empty


The float on the sender unit is going bad. Will need to replace the fuel pump assembly.

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Why fuel gauge not working gas guage on 2009 santa fe stays on empty even with a full tank of gas. Guage fluctuates from empty to 3/4 full to empty to 1/3 full at any given time.


It could be the sending unit in the tank or the gauge on the dash. A mechanic would test the signal coming from the sending unit to verify.

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I got a 2001 Chevy Venture and fuel gauge always stays on full


The problem is in the fuel sender unit in the tank. It sounds like the float part of the sender unit is binding when it's at the top (when tank is full) and hangs up there till it falls back down when tank is near empty. It will likely have to come out to be checked, fixed, or replaced. Good luck.

Apr 11, 2012 | Chevrolet Chevy Cars & Trucks

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Car of year 1998, when tank is full or medium from fuel, guage shows empty. When tank is completely empty, the guage shows full. Guage is of digital type with the bars. What can I do ? Any tests I...


Digital gauge also gets its input for fuel level from a float in the tank. Here the culprit can be that float because the error is systematic i.e., full on empty and empty on full/half. If the reading was erratic then it was something to do with IC in the bars display panel.

Aug 15, 2011 | Toyota Yaris Cars & Trucks

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Fuel gage goes from full to emty all the time. when it first stated it only did it with quater tank or less.


Sounds as if the SENDING UNIT in the tank is faulty. They work by RESISTANCE, so when the contacts on the fuel guage sending unit in the tank get worn, it will send incorrect data. Typically it will say full when the actually IS full, then, when the tank is 3/4 full, it will say EMPTY, and then, as you use more fuel from the tank, the guage will go from what is REALLY in the tank, to empty, at different times.

Only solution is to remove the fuel tank, and replace the sending unit guage assembly.

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Just filled the gas tank in my 2006 f-350 turbo diesel super duty (6.0), started the truck and the guage showed a full tank. Drove down the road about 1/10 of a mile and the guage dropped to dead empty...


A loose connection on the sending unit could cause the problem but also moisture in the tank in cold weather could also be a factor in which i would add fuel line antifreeze to a full tank of fuel..........Hope this helps you out.

Dec 17, 2010 | Ford F-350 Super Duty Cars & Trucks

1 Answer

Fuel guage was erratic then went past full mechanic installed a new pump and sending unit now it stayed at 1/4 tank and when I filled it itwent below empty. bad sending unit or bad guage or bad mechanic?


Test the gauge by using a test light ,and grounding the test light clip to a good known ground,then touch the pink wire on the connector harness going to the tank,with the connector unplugged,and key on,the gauge will move slowly to the empty mark,and lower ,then remove the test light and it will go past full,if it does this,it is a good gauge,and the sending unit,was put in wrong,or the part was bad.

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Left petrol tank stays full, not feeding/emptying - BMW X5 4.6is


inside the tank there are 2 or 3 hoses that transfers the fuel to where the fuel pump is. check for leaky hoses.

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1 Answer

Fuel guage 2001 chevrolet silverado 1500


Hi
We have the same truck that does the same thing.
The fuel sender in tank is faulty. It is in your gas tank. Common chevrolet problem.

Apr 02, 2009 | 2001 Chevrolet Silverado 1500

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