I have been experiencing KR and a strange tick for the last couple of months and I cannot for the life of me figure it out. One thing however has resolved it for a day. Here are the steps I have taken:

1. Unplug MAF and run in speed density. BLMs are still all the same but tick is gone and KR is 0.
2. Next day start up car with MAF still unplugged....tick and KR are back.
3. Plug MAF back up, tick is gone, KR is 0. Next day tick is back and KR is around 3-5 at medium-full throttle.

I dont get this one. Someone point me in the right direction.

 

ttt