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Message: <blockquote data-quote="No.Morning.Sun" data-source="post: 918876" data-attributes="member: 16137">I just put in a new upper intake plenum and 75mm throttle body.  the car runs like a champ, and feels a lot more powerful.  the only issue is the idle is all funky now. when I start it and when I push in the clutch to roll up to a stop it revs to 2000 and stays there for a while before dropping to 1000. it threw a code this morning so I went and had it read.  it was the IAC.  is it just confused?  should I disconnect the battery or do I need to use a tuner?  or am I gonna need an after market IAC to accommodate the added airflow?on a side note, i think my next mod will be a CAI.  recommendations?  offers?</blockquote>