[jstoumba]

Any cylinder roughness under boost

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[jstoumba]

What is the gapping on your plugs and are they the NGK One Step colder or denzo

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[jstoumba]

I would start there if you did install them straight out of the box then you are probably not consistent across all cylinders should be .27-.29

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[jstoumba]

I installed these plugs maybe 10 months ago. ill check and see what they are just to make sure its gonna be a little bit before i get an answer because I'm leaving work now and i may look at them when i get home if the motor is not too hot.

Also check the color of the plug may give an indication as to what is going on in the cylinder if anything

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[jstoumba]

Yeah tighten those up a bit

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[jstoumba]

Is that oil on the threads?

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[jstoumba]

a tiny amount i really need to get a air oil separator because i have bad blow by

Where you located?

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[jstoumba]

Oh ok, could be the tube seals as well...

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[jstoumba]

Hopefully it does the trick if it doesn't it's pretty reasonable to assume you're having movement in one of the rotating components if you do have blow-by it's reasonable to assume probably Pistons

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[jstoumba]

What monitors do you have up on the screen

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[jstoumba]

Check these out Dynamic Advance Multiplier (DAM), Feedback Knock Correction, and Fine Knock Learning

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[jstoumba]

Dirty maf and or front o2 sensor can cause feedback as well

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[jstoumba]

Just maf cleaner there hit or miss honestly

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