Hi Simon,
I appreciate the car should be switched off - as I'm sure you realise this is not a regular occurance and was done purely to test the movement of the gauge. However, I doubt any manufacturer designs a fuel gauge system so as to prevent the gauge from reading, just because the ignition is on ? After all, we know the system takes the 2 sender feeds and constantly averages them, and these will fluctuate both down and up, as the vehicle corners.
Additionally, as I mentioned before, the gauge has moved upon filling, although not as high as expected.
Thanks Colvert, I will try to check the sender resistance readings later today
