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#7: 11-16-2012, 10:02 AM
.:Catalyst:.'s Avatar
Title: AllWheelsDriven
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Location: Bend, OR
Car: 2006 spec.B #163 stage.2 .:CryoTuned:.
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If you're still using a MAF sensor in the intake tube, full recirc is the way to go. The ECU is expecting unmetered air (post MAF sensor so it can't gauge whether or not it's really present), to return to the inlet.