Recently swapped in a B16A2 into my civic EG, including upgrading the fuel tank from 45L to 55L as well as the dash gauges. However, my fuel gauge says empty and lights up when there is still 15-20L of petrol left, and the car has only travelled 350km. Any idea how I can solve the problem? Also, I'm averaging about 9.5km to a liter with a mix of city and hwy driving. Is this fine? Thanks for your help!