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Rv-7 fuel sender problem

Ol'Blue

Member
Can anybody help, I just installed a new Stuart Warner float type fuel sender my right fuel tank (standard Vans sender), connected to a recently installed Garmin G3X display during flight the fuel indicator on the Garmin display keeps jumping between the correct amount of fuel (approximately 8 gallons) , to full tank which not the correct reading. I have removed the float sensor and tested it with jumper leads going to the wing wiring, and it works fine, but some how when I reinstall it it goes back to erroneous full tank readings.
 
Checks...

Disconnect the G3X wiring.

On the sender, measure the resistance between the center screw and the tank skin. Is it constant or is it bouncing around? How many Ohms are you seeing?
 
Sounds like your fuel sender wire is chaved through and connects to ground intermittantly.
 
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