I just fitted an aftermarket fuel pump module yesterday and the pump is working well, but when I filled it up this morning the guage was reading just under half a tank and took 45 litres to fill up and then the guage wouldnt move up past the 3/4 full mark.
Do I have to reset something? Could I have put it in wrong somehow? It worked fine untill I changed the module yesterday.

Cheers
Dan