[isalopek]

So what i get full fuel at stop it show full, when engine is idleing it drop by 1 point, and when fan starts it drop by 2 point, fan stops raise 1 point but never full at engine idleing. I stop engine it shows again full?!?!!

[NMKawierider]

That's a voltage problem. Check your connections, cable ends and charging system.

[isalopek]

Cables are ok, cables ends also, system is charging with 14.3-14.4 during load. I have 2 wires going onto fuel gauge.

[NMKawierider]

I have found several connectors on mine where I have a voltage drop. Replaced one and it was fine so one day I'll do the other.

[isalopek]

Ok i found loose ground cable on battery that goes directly on tacho...i fix it....now only when fan start it fall down 1 point, and imidiatly when he shut off it goes up. When i put direct line neg pole battery to fuel sensor neg pole it works even when fan is on. I realise that the wires are also thin 🤔