Fuel gauge sender 110/Defender.

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Originally Posted by wovenrovings

JDNSW, ok, it is just that i once had an 86' county (isuzu) too and it had the fuel pickup separate. I will ask my dad and see what his has.

Also i was thinking about it along the earth problem lines. If my guage is reading higher than it should, that may mean that the voltage it is being supplied is too high. (something i hadn't thought as being realated is the temp gauge now has sat 1 needle width higher for a little while now). So... i am guessing there is some sort of voltage stablising device for the instruments? If so i was thinking where is this device, what does it look like and what voltage should it be putting out?

Cheers,
Dan.

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Stabiliser is in the gauge - and relies on the gauge earth to work. A clue to this being the problem is if the gauge reading changes when the instrument lights are switched on and off, as the light uses the same earth. Remember the gauge takes about thirty seconds to move though.

John

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Originally Posted by spudboy

Chris, have you checked the position of the float? You can bend the rod that attaches the float to the rheostat, and that changes the gauge reading.

I had a similar problem to you with 10-15 litres still in the tank when it showed empty, so I took out the sender, bent the rod so it sat higher up the rheostat and improved it 100%. Cost nothing too! (Except an hour or so to get the sender out/in).

Mine was a TD5 130.

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Thought about this, and also wondered whether the sender might have been installed at an angle when the new tank was put in.

However I reckoned that in either situation when the tank was filled to the brim the gauge should read full. Even when fuel is lapping out of the filler hole the highest the gauge reads is 3/4. :(

John - Turning lights, etc on and off makes no difference to the gauge so earthing would seem OK.

Chris

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Originally Posted by LoveMyV8County

Thought about this, and also wondered whether the sender might have been installed at an angle when the new tank was put in.

However I reckoned that in either situation when the tank was filled to the brim the gauge should read full. Even when fuel is lapping out of the filler hole the highest the gauge reads is 3/4. :(

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Hmmmmm - if the gauge went from 3/4 to empty, I'd think the float was catching on something, limiting its upward travel. But because it still has fuel in it when the gauge says empty it sounded like an alignment issue with the float arm.

Dunno - you'll have to pull it out and take a look at it to know why I expect. I think I am still betting on a bent float arm, or as you suggest the arm is not swinging in the vertical plane.