What exactly does the IAT sensor affect?

From: Kyle Vanditmars (kylevan@telus.net)
Date: Mon Mar 10 2003 - 16:42:37 EST

Ok, I've been reading around, and I'm confused as to what exactly the IAT
sensor affects on the engine. KRCPerformance.com says it advances timing
when it detects colder air, but I was under the impression if affected the
A/F ratio. Could someone with some actual knowledge let me in on the
secret?

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