Re: Removal of gas sending unit?

Posted by Bill On 2008/5/5 22:31:38

You might want to check out an earlier thread titled "Fuel Tank Surprise" for explanation of the operation of Packard fuel guage.

Quote from that thread:
The way the Packard gauge works is a small heating coil works on a bimetallic strip which moves with temperature change and is linked to needle. At empty, the resistance is high so very little current flows to heater, so very little heat up, and almost no movement of needle. At full, there is only a slight bit of resistance, so the heater is on and able to move the needle to maximum