clocks - HELP - petrol guage

[stuartgallafant]

i had to change my instrument cluster because some of the brains inside it gave up.

i took it from an f-reg 316i and put it in my h-reg iS. i swapped the mileage clocks over so mine is still at right miles and that works fine.

but for some reason, when my petrol tank is empty/reserve, the guage shows 1/2 a tank. my other clocks worked fine, so why shold this be different?

i've swapped the coding plugs over, but this hasnt seem to of done anything. any advice anyone?

[Gwynleym10]

Might be the grounding nut on the back of cluster. The temp and petrol guage both have grounding nuts which often come loose and then give inaccurate readings

[stuartgallafant]

i'll have a go at that then