fuel guage on 350i S2 gone bonkers - help?

[sprevett]

well it might just be a coincidence that its insane flicking from empty to full (rapidly, accompanied by clicking noise..) roughly coincides with my engine removal/replacement recently....but does anyone have any tips on where I should start looking for the cause of this latest interesting yet very annoying fault?

[Wedg1e]

Sounds like an intermittent loose connection or short somewhere. Behind the dash or down at the tank sender. Possibly a poor earth of you've disturbed the battery cables.

[jon haines]

i had similar problem with mine a couple of years ago, had it tested by an electician who told me it was goosed. bought one of ebay second hand and its fine.

[sprevett]

poor earth sounds favourite....and this car has been/is very disturbed..

[adam quantrill]

When mine went I found that it was inside the gauge - the wiring hadn't been soldered down and over time the connection tarnished. Soldered it up and it's worked fine ever since! The gauge was a Smith's one I think...