I'm guessing you are not using factory fittings, rather hose clamps & aftermarket fuel hose etc. The line is pressurised by the pump but you do not need to bleed air or anything.
If the line under the car is metal, it's unlikely to have a split. More likely a hose connection to this metal line is the source of the leak and the petrol is then running down the line and dripping off at the lowest point.
Check all connections, and be especially observant of splits at the ends of rubber hoses.
Make sure you replace any rubber hoses with the correct size to fit the fuel pipe and that it is EFI specific hose. Existing hoses may be too big. Also make sure you use fuel injection specific hose clamps (these are designed to not damage the rubber fuel line) which you can buy at Repco (Gates).
If your setup is factory, check fittings are seated properly and the copper washers are in place.
