MK 2 escort fuel guage

[Forte]

G'day everyone, i'm sure there is already a thread on here about it but i can't seem to find it, anyways i just got one of my many escorts rwc and rego'd and now use as a daily drive (1.6 auto), however the fuel guage doesn't seem to work, gets fuller when i go round corners, and then generally sits under empty. is there any easy fix for this? i know i get around the 400km plus mark for a tank, so it doesn't worry me too much, but just the convenience of have a working guage for long trips would be handy.