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Generation 6 1973-1979 F100, F150, F250, F350

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  #11  
Old 04-28-2012, 02:09 PM
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tedrow42 tedrow42 is offline
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This helps nothing but I had the same problen with my 80 even had a nice shiny new tank
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  #12  
Old 04-28-2012, 03:17 PM
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Mil1ion Mil1ion is offline
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In most cases the culprit is either the GROUND to the fuel sending unit.
All connection inside and outside of fuel tank/sending unit need to be as clean and secure as possible

the ICVR provides a 5 volts pulsing of power to the gauges so that can cause some movement left and right. This sis for both the Fuel and temp so if there is movement ,the ICVR would need replacing
or

The float has leaked in some fuel .

Having dual tanks allows for running one until empty... then switching
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Last edited by Mil1ion; 04-28-2012 at 03:43 PM.
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  #13  
Old 04-28-2012, 04:48 PM
T Col T Col is offline
 
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I am thinking that I need to chase the wires- if the float had leaked in some fuel, in theory it would sit lower than the top of the tank / fuel level and when full the gauge would show less than full because it could not get to the top of the tank (right - or if not right at least make sense?)
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  #14  
Old 05-02-2012, 05:06 PM
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As the float drops the gauge goes down.

It is the resistance in the 'TO GROUND' that changes the level.It operates on a 5volts pulsing of power to the SU sending a signal to the gauge.





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Last edited by Mil1ion; 05-02-2012 at 05:09 PM.
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