Fuel Gauge Inop

Zak said
Dana,
Red's input to fill tank all the way to full panned out. Gauge shot right up to full. My thoughts are float arm wobbly preventing rheostat board providing signal to system when fuel level below full. thanks for your expertise. Returning this sender.. Spectre a good one to aquire?

80 ohms or greater = no needle movement. 73 ohms takes the needle away from home and up to the first hash mark. There is no low fuel warning lamp but the empty hash mark and 73 ohms says you have about 3 gallons in there.
You stated your needle would leave home at switch on, so there was connection/ohm signal from the sender(s), just a wrong signal. You gauge needs 35 ohms at 1/4 tank, 23 ohms at 1/2 tank, 14 ohms at 3/4 tank, 10 ohms at full. There is nothing linear about those numbers. Calculator says a linear sender sends about 45 ohms at half tank. That 45 ohms is around 1/8 tank on your gauge. Install the meter match unit to adjust the ohms signal from a linear sender to match your meter/gauge.