OK so I am a little worried now. I get this weird idle jump from time to time where it dips to like 600 or so rpm then jumps up to 1500 rpm. So after it doing it a few times I went to Cobb Plano and one of the guys came out and watch the Access Port and said that it looks normal except for the knock count on Cylinder 4. I asked what could cause that and he said that it seems like bad gas. It happened every time he touched the throttle. So OK I thought I will not get gas at that place anymore. Oh by the way running stage 1 93 + SF Intake map. So I start getting gas at some different places. Still this knock. This morning in a 5 mile range the knock count on Cylinder 4 was 80 and I also have high counts on the other cylinders. I am starting to think that this is not gas related at this point. So I get to my office and change the tune to the Cobb stage 1 91 + SF Intake. I watch the knock count on cylinder 4 again and every time I touch the throttle I get a knock. WTF. This is a 2013 STi limited.