Comedy Fuel Gauge

[Mikeoupe]

Its never been brilliant (its always been a bit sensitive to cornering) but recently its started behaving very oddly; When I turn the ignition to the 'on' position the gauge will rise to (for example) the half way mark but when I start the car it drops to say the quarter mark, then within a few miles it will be hovering around the empty mark. Turning the lights on sees the gauge rise by approx a quarter of a tank, as does accelerating, the opposite when braking.

Any thoughts about which bit is playing up gents?

Thanks
Mike

[dog man]

Voltage stabiliser?