# 98 Rodeo idle problems

**URL:** <https://community.cartalk.com/t/98-rodeo-idle-problems/38145>\
**Category:** Maintenance/Repairs\
**Tags:** isuzu, rodeo\
**Created:** [October 15, 2009, 6:19pm UTC](https://community.cartalk.com/t/98-rodeo-idle-problems/38145 "2009-10-15T18:19:58Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Bearbugpig](https://avatars.discourse-cdn.com/v4/letter/b/94ad74/32.png) [@Bearbugpig](https://community.cartalk.com/u/Bearbugpig)\
**Post date:** [October 15, 2009, 6:19pm UTC](https://community.cartalk.com/t/98-rodeo-idle-problems/38145/1 "2009-10-15T18:19:58Z")

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Lately the engine on my 98 Rodeo can’t seem to decide which extreme it wants to be in. When I start it up it either dies without my keeping the engine reved, or the engine revs and stays revving. After driving for a few minutes it settles back into normal.

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [October 15, 2009, 8:24pm UTC](https://community.cartalk.com/t/98-rodeo-idle-problems/38145/2 "2009-10-15T20:24:24Z")

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I would clean the idle air control valve (IAC). Its right at the throttle body somewhere.

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**Author:** ![GreasyJack](https://avatars.discourse-cdn.com/v4/letter/g/df705f/32.png) [@GreasyJack](https://community.cartalk.com/u/GreasyJack)\
**Post date:** [October 15, 2009, 8:56pm UTC](https://community.cartalk.com/t/98-rodeo-idle-problems/38145/3 "2009-10-15T20:56:34Z")

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The check engine light isn’t on is it?

I’d add checking the Coolant Temp Sensor in addition to the IAC valve. A service manual should have what the resistance or voltage specs are for a given temperature range.