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Newbie Forum: Beginner/newbie/general DSM modification questions. First mods, how to run 10's when you haven't run 12's yet, any tech question that doesn't fit in another tech forum. Probationary Members must limit their tech posts to this forum and sub-forums.
I would be sure to bet it needs to be cleaned. My buddies WRX had the same issue. He has an RFL. Simple cleaning solved it. But please do as iugrad92turbo said. Do a boost leak test. Look up Jafromobile on youtube. He has a video about making a boost leak tester for under $20 I believe. Correct me if I'm wrong.
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