I have not used carbon fiber nylon but have just started using Taulman 910 and had a print look like that when I printed too fast! Was shooting for 40mmS and entered 400mS :-) I don't use cura but in S3D I keep my speed on the low side depending on the model
Will try and attache a pic of the 910 prints I just did today with a .25 nozzle, speed was 35mmS. So far I am really liking this 910, sticks to glue stick, bed temp 45C hot end 255C!

20190118_095331.jpg