My gas gauge reads empty with 5 gallons of gas. It is a new sending unit. All the wiring harnesses have been replaced in the car. I did an ohm sweep and the sending unit reads 10-70 ohms on the bench. I removed the new sending unit and it works outside of the tank. The gas gauge reads correctly in the different levels (empty, half, full) outside the tank. When I reinstall it in the tank, it reads empty and 63 ohms. I tried an additional ground to the sending unit while it was in the tank and there was no change. Thanks in advance for any suggestion! My friend's 66 Falcon has the same issue.
64 1/2 gas gauge reads empty
- Thread starter tbr
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The Shemdogg
Active Member
You need to bend the arm that holds the float downwards as it would sit in the tank so the arm on the resistor sits higher. Its pretty common to have to adjust new sending units
shem
shem
The Shemdogg
Active Member
That might be a gauge issue or old wire causing no or lower ohms at the gauge. Maybe your gauge isnt that sensitive and the 63 ohms isnt enuf to make it move from empty. Does the gauge work if you move the float up and down by hand?
shem
shem
The Shemdogg
Active Member
Joe Medeiros
Member
My gauge on my '65 coupe reacts the same way. It reads empty with about 5 gallons left. Everything checks out including having just installed a new sending unit. Thanks to Shem I now know how to address the problem. Thanks again.
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