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panhandler62 · 12-29-2011, 01:10 PM

Have you tried testing the sender outside of the tank? You will need to ground the mounting flange then you can move the arm by hand to see if it moves the needle from E to F.

If you can get a full range on the gauge that way it could be that there is some sort of obstruction preventing full motion in the tank or perhaps the replacement senders aren't the correct part for the tank.

If moving the arm through its full motion doesn't give you full range on the gauge then the sender doesn't match the gauge. Somewhere around here someone should have the impedance range expected from the sender.

12-29-2011, 01:10 PM	#2
panhandler62 Java Mechanic Join Date: Jun 2005 Location: Martinsburg, WV Posts: 6,764	Re: 72 Chevy C-10 Fuel Sending Unit Problem Have you tried testing the sender outside of the tank? You will need to ground the mounting flange then you can move the arm by hand to see if it moves the needle from E to F. If you can get a full range on the gauge that way it could be that there is some sort of obstruction preventing full motion in the tank or perhaps the replacement senders aren't the correct part for the tank. If moving the arm through its full motion doesn't give you full range on the gauge then the sender doesn't match the gauge. Somewhere around here someone should have the impedance range expected from the sender. __________________ Keith 11 Lincoln MKT -- Momma's wagon 13 G37xS -- middle age crazy car 68 C20 Fleetside -- RIP Decorating the whole town up at a cost of $27 ....