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Fuel Sender Response [message #263150] Thu, 02 October 2014 08:10 Go to previous message
Jp Benson is currently offline  Jp Benson   United States
Messages: 649
Registered: October 2011
Location: Fla
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Senior Member
I added fuel to one of my tanks in 1 quart increments to characterize the response of the sender to the fuel level in the tank. Initially the sender did not respond and then began to respond erratically. Apparently adding 1 qt of fuel is not enough to overcome the friction in the sender. After the tank was about half full I could tap the sender housing after adding each quart and it would respond. Here's the result:
http://www.gmcmhphotos.com/photos/fuel-supply/p56109-fuel-sender-response-curve.html

At 24.5 gallons there was 92.6 ohms resistance in the sender.
http://www.gmcmhphotos.com/photos/fuel-supply/p55982-fuel-level-ohm-meter.html

From 1/2 full to full the response appears nearly linear. Somewhere between empty and 1/2 full there has to be a bend in the curve. Has anyone done this before and published the results?

JP
 
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