iacv unit posted by fcz32 on May 04, 2010 at 11:36 AM
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It probably means you have a vacuum leak and air is getting in elsewhere, so even with the IAC closed all the way it's still more than necessary. If you search you'll find a ton of posts about high idle. Also, every car is going to be a bit different so there's not much point in setting the base idle off of somebody else's car. Besides, the base idle screw isn't going to do anything if you're idling really high anyways.