problems tuning timing

[BigMikeGauthier]

Hi everyone,
I have an 03 tahoe flex fuel. I tuned the MAF, the VE table, leaned PE table a bit, removed some torque management settings. Truck noticeably lightened up especially at WOT.

However I have some issues tuning timing advance. I used the MBT table and compared with other tunes from the tune directory to build my high octane table. Problem is that I keep getting random KR while I log (around 1-3 degrees). Sometimes I get random knock while cruising, sometimes with sudden or light throttle acceleration and sometimes I do not get any at all ! I do not know if this is false knock or something. I disabled burst knock, and shortened the KR recovery rate to make sure I am logging any KR that occurs.

Here is my tune do you guys think my timing table is too aggressive

I am running on regular 87 octane gas

[Evo8john]

My suggestion would be to fill it up with 93 octane or higher and see if the knock goes away. Without looking at the tune I will say that it is most likely phantom knock if it's completely random.. If it is still unchanged with the better fuel then modify the knock sensor sensitivity a little at a time until it is gone.