[TR] TR3A Fuel Guage
Randall
tr3driver at ca.rr.com
Sun Jul 6 09:50:46 MDT 2008
> Although I had my fuel guage, along with all my others,
> rebuilt at MoMa's, I confess they came back unhappily shabby.
That is very strange. Have you called and asked for an explanation? Seems
like there must be some mistake.
> the fuel guage reads dead empty most of the time, although very
> rarely it pegs to the other side.
That sounds typical of a gauge that is not securely grounded. Is there a
ground wire for the gauge? Although not mentioned in any of the factory
literature (AFAIK), I believe there should be a ground wire, with a ring
terminal and 'star' lockwasher under the nut that holds the gauge. The
other end of the wire goes to the ground point on the back of the gauge
panel.
> I suspect the guage, but to rule out the sending unit, would
> it work to hook a variable pot to the fuel guage in place of
> the sending unit, then slowly adjust the pot to look for
> movement of the needle?
Should work fine.
There's more than you could ever want to know about testing the gauge, at
http://mgaguru.com/mgtech/electric/fg_01.htm
The resistances given may not be exactly right for a TR3, but otherwise the
gauge is identical.
Randall
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