stg 4 vf 34, 550cc injectors and the likes

fuel was tuned 11:1 on a dyno, timing isnt very aggressive, boost is set at 17.5psi... i think this was on a bad fuel filter

knocked right after the tune, took away some timing, ran fine for a few months

starting knocking more.. down to 14 psi, -3 degrees timing

got it retuned for free, since the first tune wasnt too hot

ran well for a while, 10:1 fuel, little richer, safer

starting knocking again a few weeks later

did a tune up on it.. plugs (orange scars on it, white, running lean)

swapped the fuel filter.. GAS WAS BROWN

car RAN GREAT for a few weeks.. now its knocking again

thoughts opinions?

two things i can think of, something is seriously wrong with my engine, or, the tune on the dirty DIRTY fuel filter is making my car run rich now and soaking the plugs so they're not firering correctly...

Post a log... If you really are runing 10:1 you are very rich which is not good. How much timing did you pull? If you are running very low timing your egt's could be sky high...

What EM? I'm gona guess UTEC... possibility is stock ECU is trying to learn arround the UTEC.

go get retuned. First you were tuning AROUND a clogged fuel filter, now the filter is changed so should your tune. . .

Where did you get it tuned from?