Fuel gauge/sender and How to Calibrate the Fuel Guage.

[Mk2 Chopper]

23 hours ago, John McCormack said:

Understood thanks Stuart. There are a lot of very valuable posts in this forum, is there a reason this particular post is the one to be at the top? .

As this is the only pinned post, it always stays at the top, normally in a forum you'll have a few pinned posts of highly useful information, but so far this is our only one. General has four so far. 

Gareth

Edited June 6, 2021 by Mk2 Chopper

[Jonny TR6]

Used this at the weekend with perfect results. Very handy sticky !

[SpitFireSIX]

Hi,

 Why fiddle with the gauge and/or sender when you can use one of these?

Cheers,

Iain.

[Jonny TR6]

Got one of those on the split and whilst they work well, they’re a hell of a lot more fiddly than using the gauge screw method.

Ideal for linking unmatched gauges and senders, but where you’re starting with OE spec components they’re unnecessary imo.

[Casar66]

maybe something for the administration here: why is that thread pinned and always listed on #1?

 

[RobH]

1 hour ago, Casar66 said:

maybe something for the administration here: why is that thread pinned and always listed on #1?

Because it is a question which often comes up, and pinning the thread means the answer is readily available without searching. The 'General' forum has a few of them for the same reason. 

[Casar66]

mmh, I don't need that.

[SpitFireSIX]

8 minutes ago, Casar66 said:

mmh, I don't need that.

Good for you.

[RobH]

9 hours ago, Casar66 said:

mmh, I don't need that.

You shouldn't really see it unless you always start viewing the forum from the very beginning.  If you use the 'activity' options you get only the most recent posts. 

[Casar66]

I always assumed that the threads would be at the top with the latest replies. Which is the case, but not for this one thread. 
The last entry (before mine) is from October 2022, so I can't see the point.

 

[RobH]

The whole point of pinning a thread is that it always appears at the top where it can easily be found. There would be no point in pinning it anywhere else.  As I said, the 'General TR Technical' forum is the same. Below the pinned threads, they appear newest-first. The other forums have no pinned threads yet. 

If you only want to see new posts, use the 'Activity' function - that is what it is for. 

[Jonny TR6]

1 hour ago, Casar66 said:

I always assumed that the threads would be at the top with the latest replies. Which is the case, but not for this one thread. 
The last entry (before mine) is from October 2022, so I can't see the point.

 

You’re doing a cracking job of keeping this at the top of the threads list, irrespective of whether it’s a sticky or not. Maybe just let it go ?

[Mk2 Chopper]

33 minutes ago, Jonny TR6 said:

You’re doing a cracking job of keeping this at the top of the threads list, irrespective of whether it’s a sticky or not. Maybe just let it go ?

[Casar66]

ok, you've convinced me. no more stupid questions.

[RogerH]

1 minute ago, Casar66 said:

ok, you've convinced me. no more stupid questions.

Keep them coming - it keeps everybody on their toes.

 

Roger

[Tyto TR6 PI]

4-Apr-24

Apropos calibrating the TR6's fuel gauge:

1. Ensure the car is on the level
2. Empty the tank then put in precisely 1 gallon
3. Remove the fuel gauge and lever off the chrome bezel & glass
4. Stick a narrow piece of red dayglow on the face of the gauge, exactly under the position of the needle
5. Replace the bezel & glass
6. Replace gauge

Knowing the approximate fuel consumption, when the needle reaches the red mark, I know that I have a gallon left (and hence, ~n miles before empty)

It's saves the PI system being blocked by sediment and, in any case, the engine doesn't like running on air!

Hope that this helps.

[Phil H 4]

Between the showers, I thought I"d look at the fuel gauge which has never been right.

Following Pinky's post regarding recalibrating. I have removed the gauge and can see what I think are remnants of the cork plugs.

The two slotted holes do not appear to move ( didn't want to apply too much force ) are they just stiff or is this a different type of gauge to that described.

Thanks Phil

[RobH]

The sliders can be tight - they are pivoting on rivets.

This may be useful - particularly the warning about insulating the adjusting blade:

https://chicagolandmgclub.com/techtips/mgb/f-gauge_cal.html

[Phil H 4]

Thanks rob,

Very useful particularly seeing the internal workings.

 

[pinky]

 

A thought , 

I bought a landrover fuel sender, this had the ability to have a warning light fitted so when the level dropped the light would come on,

I then emptied the tank and added fuel until the light went out, I estimated aprox 40 miles left in the tank,  

This has been really helpful especially when going over the peranese and on to Andorra I felt more secure, especially with no light on,

I did buy a larger fuel tank for the trip, however the sender will fit in a standered tank 

Pink 

 

 

[Jonny TR6]

The Gauge Wizard can be programmed to operate a light unit. On my split I've got an original fuel gauge and have wired in a small discrete LED on the dash. When the fuel get to quarter of a tank (2 gallons) the light comes on. When it gets to 1/8th (1 gallon) the LED flashes. Very handy.

[Rob Waldron]

Two other tests. 1. a volt meter on the feed to the gauge should be around 10v as through the stabiliser. 2. disconnect the supply to the tank and quickly touch it to ground it should flash the gauge  to full. if not its a fault with the sender. Also the volt meter on that cable should read 10v . 

Another tip when testing with the power on remove the live to the coil, protects the coil and ignition. I would also turn off the fuel pump as well. 

[Z320]

I always drive max 250 miles, 

top the tank up between 220 - 260 miles and reset the counter.

For special cases I have an stone edge style wooden petrol stick. 

[Pete E]

On 6/12/2025 at 8:12 AM, Z320 said:

I always drive max 250 miles, 

top the tank up between 220 - 260 miles and reset the counter.

+1

Pete

[pinky]

Hi, you can fit a landrovef fuelsender,   that has a warning light come on the dash  when the tank empties to approximately gallon and a half,

Works a treat 

Pink