# 02 Dakota idles rough with the AC on

**URL:** <https://community.cartalk.com/t/02-dakota-idles-rough-with-the-ac-on/144849>\
**Category:** Maintenance/Repairs\
**Created:** [July 20, 2019, 2:54pm UTC](https://community.cartalk.com/t/02-dakota-idles-rough-with-the-ac-on/144849 "2019-07-20T14:54:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![KregerVXC\_143438](https://avatars.discourse-cdn.com/v4/letter/k/b5ac83/32.png) [@KregerVXC\_143438](https://community.cartalk.com/u/KregerVXC_143438)\
**Post date:** [July 20, 2019, 2:54pm UTC](https://community.cartalk.com/t/02-dakota-idles-rough-with-the-ac-on/144849/1 "2019-07-20T14:54:58Z")

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2002 Dodge Dakota 3.9, 5 speed. Whenever I have the AC on, the pickup just runs really rough. Engine runs good otherwise, no misfires or anything. Recently I’ve also begun to hear a feint clattering sound when the AC is turned on. Thanks in advance.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [July 20, 2019, 4:25pm UTC](https://community.cartalk.com/t/02-dakota-idles-rough-with-the-ac-on/144849/2 "2019-07-20T16:25:30Z")

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The Idle Air Control valve is suppose to bump the idle speed up when the AC is turned on so the engine doesn’t idle rough.

[https://www.rockauto.com/en/catalog/dodge,2002,dakota,3.9l+v6,1384590,fuel+&+air,idle+air+control+(iac)+valve,6072](https://www.rockauto.com/en/catalog/dodge,2002,dakota,3.9l+v6,1384590,fuel+&+air,idle+air+control+(iac)+valve,6072)

The IAC valve may be dirty or is defective,

Tester