If you do get the sender out of the tank for cleaning/examination, please save yourself a later re-visit by checking the following.
Here's a rough-and-ready sketch of the gauge sender:
As well as fuel level making the float move up and down vertically, there are forces on the float when braking and accelerating, as the fuel surges backwards and forwards in the tank, attempting to take the float with it, that tend to try to move the thing forwards and backwards in the tank.
The bit I've labelled "Critical angle" will, over the years, tend to open out a bit and reduce the pressure of the contact on the resistance track, via its leaf spring.
The first time I got in there, I just re-bent the leaf spring a bit, which seemed to give an improvement, but only for a week or two. Trouble is, if that critical angle
has opened up too much, the contact will still be able to pull away from the track if the upward movement shown in this pic (front to back when in the tank) is too much. Because the PCB is in the way of movement that will tend to close the angle up, these forces will have an 'opening' effect on the critical angle, on average.
Dismantling the rod from its plastic mountings, and giving that bend a little 'tweak' to close it up a bit, should solve the problem if this is what is happening.
You can see whether it is the problem by just moving the float about in all directions, and observing whether the contact leaves, or nearly leaves the track.
If this does turn out to be relevant to your problem, take some photos and write a little "How to", as I think this problem will become more and more common as the Omegas 'mature'.
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Topic: effing Fuel Range display (Read 1954 times)