# Isuzu Rodeo and idle issue

**URL:** <https://community.cartalk.com/t/isuzu-rodeo-and-idle-issue/18045>\
**Category:** Maintenance/Repairs\
**Created:** [August 12, 2008, 1:08am UTC](https://community.cartalk.com/t/isuzu-rodeo-and-idle-issue/18045 "2008-08-12T01:08:36Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![bubbadownsouth](https://avatars.discourse-cdn.com/v4/letter/b/d07c76/32.png) [@bubbadownsouth](https://community.cartalk.com/u/bubbadownsouth)\
**Post date:** [August 12, 2008, 1:08am UTC](https://community.cartalk.com/t/isuzu-rodeo-and-idle-issue/18045/1 "2008-08-12T01:08:36Z")

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I’ve got a 1999 Isuzu Rodeo with a fuel injected V-6 engine. Great vehicle. Only problem is the is the engine idles at 1500 rpm’s per the tachometer. This increases to 2000+ when the air conditioner is on. Just looking for a starting place besides the local repair shop. I have fairly good mechanical ability.  
  
  
  
 All the Best,  
  
 Bubbadownsouth.

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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:** [August 12, 2008, 1:11am UTC](https://community.cartalk.com/t/isuzu-rodeo-and-idle-issue/18045/2 "2008-08-12T01:11:19Z")

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Check into the Idle Air Control/Air By Pass motor. This is the single component that controls the engine idle speed under all conditions.

Tester

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**Author:** ![bubbadownsouth](https://avatars.discourse-cdn.com/v4/letter/b/d07c76/32.png) [@bubbadownsouth](https://community.cartalk.com/u/bubbadownsouth)\
**Post date:** [August 12, 2008, 1:20am UTC](https://community.cartalk.com/t/isuzu-rodeo-and-idle-issue/18045/3 "2008-08-12T01:20:23Z")

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Any way to check this without replacing it?

Thanks,  
Bubbadownsouth

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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:** [August 12, 2008, 1:38am UTC](https://community.cartalk.com/t/isuzu-rodeo-and-idle-issue/18045/4 "2008-08-12T01:38:27Z")

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The only way a DIY’er can check for defective IAC/ABP motor when it causes a fast idle is to, smack it with the handle of a screwdriver while the fast idle is occuring, and if this effects the idle, that’s the problem. Other than that, unless you have the proper equipment, no.

Tester