Join Date: Dec 2002
Location: Saint Louis, Missouri
Re: gas gauge works great SOMETIMES??
When you located the ground to frame coming from tank sending unit, and cleaned it up and re-mount it to frame, how did the connection of the terminal look on the wire. This connection as well as others has to be good. The ground wire then goes up to a tab on the sending unit and it too is a crimped connection and there may be an issue there as well.
There is also another connector in the trunk that may also be poor.
If all of these are good, then chances are the tank will have to be dropped to further check things.
You could just as a temporary test to make sure things are good forward from the trunk, to and through the gauge, is to disconnect the sender wire in the trunk and securely ground the side of the wire that goes forward towards the gauge. The gauge should then be on empty or below. Now go out and drive it around and if it stays on empty then chances are even greater that the issue will require the tank to be dropped.
1974 Spirit Of America Nova (being restored), 1973 Nova Custom, 1968 Chevy II (Garage Find 2012)
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