Carb losing fuel over night.

Hi guys
My LeBaron is now running again and has a new Carter BBD (Chinese copy...)
However, it now takes a long time to start it from cold like alle the fuel disappears over night from the fuel line.
It didn´t have this problem with the old Holley 2280 lean-burn carb.

The fuel pump is new, and the vapor canister is still in place.
Most fuel and vacuum hoses have been renewed.
I have been running on 95 oct with 10% ethanol, but am switching to 98 / 5%.

My mechanic was aware of this and...

Carb losing fuel over night.
Author: Toro67