Shapcars 10 Posted August 1, 2016 Share Posted August 1, 2016 The fuel gauge on my 66 cutlass goes past full every time I start her and goes to the correct (?) reading after a while. I filled her up last week and the gas gauge has remained pegged above full. Any ideas? Link to post Share on other sites
wwayman 0 Posted August 2, 2016 Share Posted August 2, 2016 Probably a bad ground at the tank or sender unit. Can you get to the sender without dropping the tank? Link to post Share on other sites
Shapcars 10 Posted August 3, 2016 Author Share Posted August 3, 2016 Not sure, just moved and my manuals are packed somewhere... I will search the web. Link to post Share on other sites
Larry Schramm 3,140 Posted August 8, 2016 Share Posted August 8, 2016 Make sure the connection at the tank is good and clean. If the fuel gauge see an open/ high resistance circuit it would read full all of the time. Should be GAUGE-------Fuel tank sending unit------GROUND. Any break in the circuit between ground and gauge would register full. (Variable resistor) Link to post Share on other sites
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