thank you..going after this nasty problem today. Fuel Gauge works when car starts and about 2-hrs latter ...shows Empty when I know I am Full. Do gauges stop working after "heating" up????
Yep, Its possible. Connections inside a gauge are welded. Those can't come and go.
The gauge has contact studs swedged into a fiber board. That stud is attached to the printed circuit board with stamped tin 'pal' nuts. Electrical connection at that nut can come and go with temp change in the gauge/stud/board.
The mechanical limiter heats up also but if the limiter was the issue the temp gauge operating would come and go also. If the temp gauge works fine at all times, you would be wise to clean and tighten those connections too if you go there.
