Fuel Sender Troubleshooting

[MarkWebb]

see my readings above. Does not seem far out.

[F.C.]

Max_Torque said:

I'd suggest its more likely to be a ground offset between the earth of the dash and the earth of the sender units, especially if people are running with very low sender voltage ranges due to using large value pull ups etc!

The answer would be to earth bond the two sender units together and then on to the gauge, more wires and messing but should do the job.

[macgtech]

Mark,

What input are you using for the fuel sender in the SDL? The AT's all have the pullup resistor in place and the AV's do not.

I would also add that it is worth updating the software in the dash before changing anything, reading all the release notes carefully. We have had all sorts of issues trying to get one of our inputs working to find that it was a software bug - we updated the dash only to find that it worked but all our AT's stopped working. Low and behold 3 days later another patch came out which fixed everything!

Jonny

[MarkWebb]

Thanks Jonny
The fuel level was connected to an AT input when the car was built so fixed 1000ohm resistor I believe (although there seems to be an option to change it in the software. I am not sure if this requires a physical change as well?)
No problem changing to a different input now that I understand what is going on if I can access the back of the dash which is unbelievably difficult in my car!