# 99 Venture, high idle

**URL:** <https://community.cartalk.com/t/99-venture-high-idle/50156>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, venture\
**Created:** [June 11, 2010, 12:59am UTC](https://community.cartalk.com/t/99-venture-high-idle/50156 "2010-06-11T00:59:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Blaster72](https://avatars.discourse-cdn.com/v4/letter/b/a5b964/32.png) [@Blaster72](https://community.cartalk.com/u/Blaster72)\
**Post date:** [June 11, 2010, 12:59am UTC](https://community.cartalk.com/t/99-venture-high-idle/50156/1 "2010-06-11T00:59:49Z")

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I have a 1999 Chevrolet Venture LS van that has an intermittant high idle problem on start up. When I notice the problem shutting the car off and re-starting it usually clears the problem. I have heard this may be a vacuum leak(?) but I think it may be electronic like a throttle position sensor going bad. Any thoughts? I want to avoid a shop bill if I can manage this repair at home. Thanks!

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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:** [June 11, 2010, 1:20am UTC](https://community.cartalk.com/t/99-venture-high-idle/50156/2 "2010-06-11T01:20:37Z")

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One thing that can cause a high idle is a defective Idle Air Control valve.

Locate the IAC valve on the throttle body. And the next time the idle goes out of control, take the handle of a screwdriver and rap on the IAC valve. If the idle changes when doing this, replace the IAC valve.

Tester