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fuel gauge reads over full or below empty


dirtbikes4fun02

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1991
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Ford
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Manual
i have a '90 4 cyl 5-speed ranger standard cab long bed.
the fuel gauge when u turn the key on goes straight to full or straight to empty and it does it randomly. when u let it go to empty and cycle the key it will go to full, then fall off slowly when u turn the key off, then when u turn it back on, it will either go back to full or go straight to empty. and it has 1/2 tank of gas
i changed the whole pump, sending unit, float and everything last night. i checked all the wiring, and clean the plug wiring. i grounded out the yellow/white wire, checked the ohms on the sending unit, and everything checked out fine.
then i tried the gauge and still the same problems. could this be the slosh module?
i tried pulling the cluster out, but the speedo cable would not give me enough slack to unhook it and remove the cluster

somebody please help me out. i really need this to work.
thanks
 


vader436

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1994
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Ford
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3.0litre V6
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Manual
did u solve ur problem, bcuz imhaving the same problem with my gauge, need help please
 

Mark_88

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Dordge
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3.3 Fuel Injected
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Automatic
My credo
Love Thy Neighbor
A bit late but...could be a bad grouund or a corroded connector on the top of the tank...mine has been wonky since I got the truck...when I had the bed off I cleaned the connectors and it worked better (though not perfectly)...a bit of dielectric grease in the connector goes a long way too...

if that doesn't help then you may need to replace the sending unit in the tank...
 

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