Go back to Stock Kernel I upgraded to faux kernel not a long time ago and I am having a lot of issues with it. I want to go back to the original kernel. I even tried restoring to factory defaults but it didn't restore the kernel. I don't have a backup of the old kernel. I am running 4.4 on a nexus 4
Here is a list with stock kernels for nexus 4. As said before, simply download it and flash it like any other kernel. 

http://forum.xda-developers.com/nexus-4/development/kernel-stock-flashable-kernels-t2381128