Default kernels not working?

So recently i just flashed Paranoid Android 4.4.4 for the Xperia Z (http://forum.xda-developers.com/xper...d-4-4-t2641576) and I wanted to install a custom kernel. So far all the kernels I have used either resulted in a bootloop or endless crashing when i start my phone up. Any suggestions for a kernel which will work with this rom?

Thanks =)