Re: [AMC-list] A 72 Matador Gas Gauge Question Again

[tom jennings <tomj@xxxxxxx>]

It's certain to be the sender itself. The float lifts an arm that turns a
rheostat, a brass wiper across a resistance card. They get corroded. Gotta
drop the tank, remove the sender, and carefully  sand with 600 grit the card
and wiper tip.

Some parts are corroded and some aren't -- that's why it's intermittent. If
it never moved at all, or was stuck at full, it would indicate that it was
shorted or stuck or sunk float etc. The fact that it does move around says
corrosion on the card.

If you do pull it out, you might go buy a new float, filter sock and O-ring
kit for $10 or whatever. You don't want to go in there twice!



On Tue, Nov 3, 2009 at 02:43, Mr. AMC <amc74hornet@xxxxxxxxx> wrote:

> I know I asked this question almost a year ago but I need my mermory
> refreshed. The one thing that makes me nuts is a non functioning gas gauge.
> The previous owner said it worked. It was his wifes car and she is not what
> you would call a rocket scientist by any means. I doubt that she ever put
> more than 20$ worth of gas in it at a time. I filled it up and the gas gauge
> went from 1/4 to 1/2 and then 2 weeks later it read empty. I drive it
> locally but not far and run it from time to time to keep the battery full.
> When I got the car back from the new simulated vinyl top repair the shop
> owner said the gage read empty. I said I know. I figred itn was time to put
> some gas in it. I was warming the engine up to take it to get some gas when
> it died. Out of gas. I put 2 gallons in it and it started right up. I put
> 20$ in gas in it and now the gauge reads almost 1/4 which should be about
> right for the amount of gas I put in it. I am getting the car back from some
> minor repairs today. I
>  had the ground and sender wires cleaned and the sender wire grounded. It
> pegged the gauge. Someone said somthing about maybe a problem with the float
> being bad and when the tank is filled over half it sinks? Are these floats
> replacable? if so where can I get one. I would prefer to get a new sender
> like I did with both my Hornets though due to the price of labor only to
> find out a float replacement did not work and I flushed the money down the
> drain.
> "Doc"
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