Surging Idle and P0638 CEL Issue Solved
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01-10-2011, 05:12 PM
2004 wrx sti
I think this may.... just... have... save... my... @$$...
EXACT SAME symptoms.
guess what? I removed my OEM PCV check valve when I put on a air/oil separator.
gonna stop by the parts store on the way home...
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