[T3] calibrate fuel gauge

[Daniel K. Du Vall]

Jim mention that to me when I was trying to figure out the jumping gauge when you turned on the flashers but all attempt to clean and get better connections has not changed that problem either. 
I am going to be putting the car down to rebuilt the engine and also go through the wiring and thoroughly clean all connections and replace any wire that is bad since this car has a few gremlins electrically.

Thanks,
Daniel Du Vall

-----Original Message-----
From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> On Behalf Of Keith Park
Sent: Sunday, March 24, 2019 5:22 PM
To: type3 at vwtype3.org
Subject: Re: [T3] calibrate fuel gauge

Ive found that the ground connection from the nichrome to the pot metal has been bad on several Ive messed with.

Keith

Topnotch Restorations
topnotch at nycap.rr.com
http://www.topnotchresto.com
71 Squareback  "Hothe"
65 Notchback  "El Baja Rojo"
93 RX7  "Redstur"
95 Chrysler Cirrus Lxi "Cirfogsalot"
"hanging out at the tail end of the bell curve, and loving every minute of it!" 
-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Michael Fritz
Sent: Sunday, March 24, 2019 4:12 PM
To: type3 at vwtype3.org
Subject: Re: [T3] calibrate fuel gauge

I've done it on my 74 Super Beetle. I don't know if it's the same for a Type 3. It's been over 20 years, so I'll do my best.

On the back of the gauge, you should see two holes, with what looks like sprockets. (They aren't sprockets, but rather levers.) The sprocket looking levers can be moved by inserting a small flat tip screw driver, and rotating it.

Each lever serves a different purpose. Unfortunately, I don't remember which one serves which purpose, but I know the purposes.

One adjusts the position of the range of travel. For example, let's pretend the needle has a range of motion of 20 degrees. Adjusting one lever will change WHERE that range is located, but it does not change the size of the range. For example, let's say an empty tank sits at the top of the red zone.
Adjusting that lever will move the range up or down, but the full reading might be wrong.

That's where the other lever comes into play. It changes the size of the range. For example, adjusting it would add or subtract from our imaginary 20 degree of range. 

The procedure is as following: Simulate an empty tank. Remove the sending unit or something, or run the tank empty. Once empty, with the ignition on, or the gauge circuit otherwise energized, begin to adjust one of the levers.
Is the gauge moving much? Find the lever where the gauge moves a lot. Then set the needle where you want it to read "empty".

Then, simulate a full tank, or fill the tank. With the gauge circuit powered on, adjust the OTHER lever. This will increase or decrease the size of the range. Adjust it until the needle reads "FULL".

--Michael

-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Daniel K. Du Vall
Sent: Sunday, March 24, 2019 12:31 PM
To: type3 at vwtype3.org
Subject: Re: [T3] calibrate fuel gauge

No takers on my question or is it that it's not possible?

Daniel Du Vall

-----Original Message-----
From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> On Behalf Of Daniel K. Du Vall
Sent: Thursday, March 21, 2019 10:55 AM
To: type3 at vwtype3.org
Subject: [T3] calibrate fuel gauge

Is there a way to calibrate a fuel gauge on a 72?
Mine is off by the red zone both full and empty.
Empty is the top of the red zone and full is the equally above the full mark.

Thanks,
Daniel Du Vall

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