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three senders all wrong? I'd yank that gauge, clean the contacts, check your cluster ground, find an ohm chart, then buy resistors from radio shack and use them to adjust the gauge.




Sorry I've sorted out enough gauges on these cars to tell you the repo senders are junk... To test the gauge IVR & wiring a gauge system tester is the tool of choice..



But the fact he has plugged in an original sending unit & it works tells me the repo senders have all been bad...

Personally I've had the last three fuel senders rewound by my local instrument repair shop.. Costs more than a repo sender but it works...

BTW They can rewind the 3/8 repo sender too...



still can't hurt to check the grounds and test the gauge. I did 3 of them a couple of years ago. 2 were pretty good...one was way way off. Even if it's the sender, still a good idea to get the ohm chart and check the gauge.

If you intend on opening up a resto shop or selling restored clusters, that tester (what is it called, a decade resistance something?, I forget) is great. For the backyard guy fixing his fuel gauge, 5 bucks worth of junk from radio shack will do the job just fine.

The gauge is more than 35 years old, it couldn't hurt to check it