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Re: Question on fuel gauge (archive)

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Posted by MitchM on June 27, 2001 at 09:19:40:

In Reply to: Question on fuel gauge posted by Rod from Dallas on June 27, 2001 at 07:59:09:

When the tank is full my gauge is steady. When I get under 3/4 it starts jumping around. Does this sound like a sending unit problem? Is the Tii sending unit different than the carbed 02? Are new sending units available, and from whom can they be ordered? Thanks

Try cleaning the float on the sender. To remove the sender, I've used the cross screwdriver method as shown in books, counter-pressure, works ok. The float is a plastic device that rides on two very thin gauge wires. Rust or corrosion may have formed on the wires causing increased resistance. Be very careful, though, because those wires are brittle and will snap if you look at them wrong. Try using alcohol and a cloth, or some guys use a soft pencil eraser to rub the wires. Also, check the brown ground wire on the back of your instrument cluster-classic cause of jumpy gauges.

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