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Fuel Sender

2.4K views 7 replies 4 participants last post by  hay fever  
#1 ·
Hello ! I have a 1984 XJS HE and a problem with the fuel gauge....
I have had the sender out of the tank and when I move the float up and down, the gauge on the dash and the fuel warning light work fine with the garage in the dash more or less representing the amount I have moved the level on the sender. However, when I put everything back together, the gauge shows empty and light is on. There was over 20l of fuel in it the first time ( I know because this is how much I syphoned out to get the level below the sender and I put it all back in !), and I have just been to the garage and added another 20l (just in case the 20 wasn't enough to make a difference!) - the garage hasn't moved. I checked the float when it was out and it does indeed float... Any bright ideas ? Are the baffles in the tank known to move / break and could be fowling the sender ? It looked like the float was able to move when I put it in, but it is kind of hard to be sure.....I'd appreciate any thoughts as I'd rather only drain petrol one more time ! Thanks in advance, Ian.
 
#2 ·
Hi and welcome to the forum.
If with the sender out and you move the float it works then the only thing I can think of is that you have put the unit back in upside down so the float cannot rise.

Roger
 
#4 ·
Thanks Roger - you made me panic that I had it in upside down - but thankfully not ! Turns out the coat hanger type wire on the sender just wasn't the right "shape" to float in my tank - it was fowling on something, not sure if it was the wrong part or a non standard tank - anyway I have bent the coat hanger bit and it now works - the calibration is probably off, but it will do ! Ian.
 
#5 ·
Well done Ian. Had to be something simple.

Roger