Idle air control valve?

Question

what is its purpose and what happens when it malfunctions?

Answer 1

iac allows air pass the throttle while closed it is  to achieve smooth idle and lets more air in to increase rpm while turning at a stop or while ac is on

Answer 2

The IAC or Idle Air Control valve simply allows air to bypass the throttle blades in the throttle body, providing a stable idle speed. The PCM controls the opening size by moving a pintel valve or shuttle valve back and forth to change the minimum air requirement.  

Answer 3

Controls the air going into the engine at idle. If it malfunctions, your engine will not idle properly.

Answer 4

Here ya go...

http://autorepair.about.com/cs/generalin...

Answer 5

sends a signal to the computer.ie:for control of fuel mix.along with other sensors to make the correct decision the computer is designed with

Answer 6

it controls the air and fuel mixture. if it goes bad, it wont idle right and it will throw a code.