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Fuel Sending Unit mismatch??? 444-544

uid 25070's pic
posted by  Barongrey on  Mon Oct 11 08:55 CST 2004
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last visit: Wed Dec 3 15:46 CST 2008
[RELATED]

OK, I bought a '64 PV544 with a non-working fuel gauge. I initially thought the gauge was at fault (since none of the other gauges worked either!) so I got a gauge from a 122. Same gauge, except it has a small coil on it back side.

After I installed it the gauge still read 'dead' so I pulled the sending unit, only to find the windings and armature were missing. Basically it was a plug used to keep gas from spilling out of the tank, nothing more!

I got a sending unit, supposedly from a 12V PV544, and inspected and tested it before installing it.

Now the problem was that when I filled the "1/2 full" tank, it took 8+ gallons of gas. Apparently 1/2 full means EMPTY.

Back home again, I swapped the new gauge for the original gauge, then took a short road trip to my Dad's place - a little over 90 miles.

The gauge read 3/4 when I got there, which COULD have been more or less correct. I filled the tank before returning home, and again, 1/2 full was nearly running-on-fumes empty.

The needle didn't reach the 1/2-way mark and stop...it read smoothly all across the top half of the markings, so the armature isn't getting hung up or stuck.

Now I need to figure out a way to modify the sending unit (maybe a resistor?) to get a corect reading.

Any thoughts or suggestions?






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