Spark knock. Any ideas?

Very easy-I should do a video. If you are going to do it PM me I will at least tell you what to do

 

It is extremely simple. Unplug the MAF wiring harness and take out two screws. Pull out the MAF sensor and spray it down with the proper MAF cleaner. Let dry and put back in.

Edit: ^ Didn't notice you beat me to it

 

I leave it in. First I disconnect battery. I remove the air snorkel behind it, and the air filter in front of it, and spray the sensor from both ends, let it air dry for 10 minutes, reinstall and reconnect battery which resets ecu. Let me know if you guys want a short video. I'm about due for a cleaning

 

And no one is lying here about getting the MAF cleaner! Its easy to get now almost all parts stores sells it, its just somewhat pricy, but if you use the wrong stuff you will find out how pricy a MAF is.
its easy, been doing it for many years on Toyota, Nissan, Ford.