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					Originally Posted by Dean  If the BOV is bad, pulling it and blocking all the holes should fix the issue at idle.
 I have an after market BOV & plug you can try.
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i can only think about when my dumbass thought it would be cool to get a vent to atmo bov when i had my first 02 WRX, every dam time i would let off and at idle the shit would stumble endlessly.
then when i got the black one and front mounted it i had a tial bov. that POS had like the losest spring known to man. everytime it got cold here or i went down the hill to sac or the bay it REFUSED to idle. period. did the EXACT same thing daves cars been doing. 
i cant believe i didnt see the parallel when he was in my garage. i must have fucked with that tial BOV for a week straight. i feel stupid.