False Knock?

[oztracktuning]

I am chasing some knock at around my stall speed that doesnt want to go away. I wonder if it a vibration through the car from the big changes in force when the car hit stall speed on kickdown etc. The knock doesnt seem to impact on the afrs??

Here are some pics
I have not that much timing in the trigger areas - yet up to 28 deg at high rpm without issue.