Gas Guage Sending Unit

[GLASEM]

My gas guage has been reading erractic lately so I pulled the sending unit for a cleaning.

Took it apart and found some varnish on the float slides. Checked guage out of the tank got great readings.

Put it back in and bolted down what I thought was OK. No readings.

Removed several times OK out of tank. Put it back no readings

Finally got it to work back in the tank if I barely tightened the nuts.

What would cause the unit not to read if the nuts were tightened more than they are now?????

BTW did replace the gasket

[RWebb]

bad ground or bad signal wire?

if tight = no sliding, seems there would still be a reading (tho static)