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Is there a fuse to check or is this a caused by a sticky float or something?
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Willenium wrote:Sorry to drag this up after so long.Wasn't sure if it was worth starting a new thread for it though so here we are.
As a complete opposite, does anyone know about the fuel light staying on? Was driving back from London last night and the fuel light came on.I could see there was fuel and the needle was gradually moving as you would usually expect so I know there is fuel but the light was fully on for the rest if the journey.
Is it known for the thermistor to fail like this? I have another sender I can try if it comes to it.
Peter Gidden - SBITS wrote:Most likely bad low fuel sensor in tank.
Pauln wrote:The fuel level sender is a simple arm and float, as the fuel level drops the arm moves a wiper arm across a wire wound resistor and the gauge interprets the change in resistance.Over time the electrical contact between the wiper arm and the wire wound coil deteriorates giving a false resistance.
This is likely to be the issue, but if it is it's easy to fix just remove the sender assembly, and carefully clean up the wire wound resistor with a piece of fine grit wet and dry.
Just don't get to enthusiastic.
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If you have a multimeter aim for readings of something like 3 ohms with the arm raised(full tank) increasing to around 110 Ohms arm fully lowered.
You'll need to gently bend back the tabs on the folded metal cover over the wire wound resistor to gain access once you've removed the sender from the car.It's all pretty straightforward.
Paul
Willenium wrote:Sorry to drag this up after so long.Wasn't sure if it was worth starting a new thread for it though so here we are.
As a complete opposite, does anyone know about the fuel light staying on? Was driving back from London last night and the fuel light came on.I could see there was fuel and the needle was gradually moving as you would usually expect so I know there is fuel but the light was fully on for the rest if the journey.
Is it known for the thermistor to fail like this? I have another sender I can try if it comes to it.
acf8181 wrote:
Cheers for the info, popped the sender out(and saw plenty of fuel left despite needle showing empty!), and got my multimeter on it.
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.readings both lowered and raised were spot on.
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.so guessing my guage has is wrong.
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Is possible when a mph guage was stuck over the kmh speedo they disturbed the needle to the fuel guage as well and put it in wrong place(they seem to have done this with the speedo too as its about 10mph out!)
Pauln wrote:acf8181 wrote:
Cheers for the info, popped the sender out(and saw plenty of fuel left despite needle showing empty!), and got my multimeter on it.
.
.
.
.
.readings both lowered and raised were spot on.
.
.
.so guessing my guage has is wrong.
![]()
Is possible when a mph guage was stuck over the kmh speedo they disturbed the needle to the fuel guage as well and put it in wrong place(they seem to have done this with the speedo too as its about 10mph out!)
If as you say the readings are spot on, and even though you know there's still plenty of fuel in the tank the gauge shows it's empty, it does sound as though that might be the problem, especially if you're not seeing the low fuel light come on at all.
Did you get them to change all the gauge faces, or just the speedo?
Paul