Surging Idle and P0638 CEL Issue Solved
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01-10-2011, 06:28 PM
2004 wrx sti
wow. I'm still in a bit of shock.
my setup sounds similar to yours. I run a HFS-6 on a stock turbo. High boost (23lbs). I have a Grimmspeed AOS on it. I didn't follow the recommended directions, and deleted the PCV...
I'll update if this works...
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