petrol gauge

[badobsession]

Hi have an interesting thing happening to my petrol gauge
it is reading backwards
reading full when no petrol in and when i put fuel in it shows empty


any idea ......

[LordAnthony]

I seem to remember someone saying that this can happen when you use a later style fuel sender with an older, golden, speedo/gauge. Or is it the other way round?

[mike.perry]

What speedo do you have?

[badobsession]

do not know about the speedo type but it worked ok in my last truck a few years ago
cant say what sender is in the tank but the gauge on the last speedo worked ok

[bmcecosse]

Is it a 'hot wire' gauge ? In other words -does the needle creep slowly across the dial when you switch on ? If it's the older 'fast moving' needle - then could be worth swapping over the connections on the back of the gauge.

[mike.perry]

The speedo question is relvent as the later fuel gauges work through a voltage stabiliser

[libbor]

what ever sender you have just swap it for the other one. it will work ok then.

[badobsession]

have put £25 of petrol in and the gauge is reading 1/2 so next run out we will see what way it is going
the tank in the truck by the way if a ford and i think the sender is off a minor .