try bleeding the clutch also check the master and slave and make sure there are no cracks or anything like that in it.

 

the master and slave cylinders have already been replaced.

 

you may just need to bleed the line better. There is a specific spot in the line that is very tricky to get the air out of. If the pedal sticks to the floor after shifting gears only during left hand turns, you need to worry about crankwalk. But if it does it during just normal driving or right turns too, its air in the lines.

 

regardless of how new they are dose not mean the housing was not cracked durring install or if bolts are not fully sucrured just remember they are made of freaking plastic not metal. this happened on my last car and it turned out to be a small crack where the master i beleve it is bolted to the firewall.