[arnebret]

I checked the sender unit, all up to specs. The floater doesn't seem to lose buoyancy. Besides that, i tested the floater on the car. All the way up (3 ohms) should give me a FULL reading, but it stops at 3/4. So the sender unit is fine, something is wrong between the sender and the gauge. See my initial post.

The resistance somehow gets too high for the gauge, so the lines aren't 100% clean somewhere a long the way...