[T3] Strange Fuel Gauge Behavior

[Dave Hall]

There's no damping in the Type 3 electrical gauge, which is why it shows the
level instantly.  I'm guessing there's a bit of deposit on the wires inside
the sender tube which is making the float stick for a time at the full
position after refuelling.  Presumably it drops again at some point.  It can
be a fraught job to pull the gauge apart and get the float sliding smoothly,
and a higher than even chance of breaking the hair-like wire in the process.
It will be much safer to just live with the slight stickiness.  Take a look
at http://home.clara.net/hallvw/fuelsend.htm if you want to see a diagram of
what's inside.

The problem with 4-way flashers sounds like a bad earth somewhere. Does the
gauge move up in the interval between flashes?

Dave
UK VW Type 3&4 Club
===================  

-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Doug Brashear
Sent: 01 June 2017 22:54
To: type3-vwtype3.org at lists.vwtype3.org
Subject: [T3] Strange Fuel Gauge Behavior

Hello all,
I'm seeing some strange behavior in my '73 Fasty's fuel gauge, and was
hoping to hear your sage advice on it.
Here's what's going on:
When I first turn on the car, the gauge needle instantly jumps up to the
appropriate level based on the fuel in the tank. The reading does seem to be
accurate. But when the tank is full, the instant travel sometimes get the
needle stuck at "full". My other VW fuel gauges send the needle to the
appropriate level slowly...not the case here.
Then, when the car is fully off, and I turn on the parking lights and the
4-way flashers, the needle jumps back and forth with the blinking of the
flashers.

Whaddya think? Thanks in advance!
- Doug :-)Falls Church, VA
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