# 2003 Ford Mustang High Idle when I start

**URL:** <https://community.cartalk.com/t/2003-ford-mustang-high-idle-when-i-start/74283>\
**Category:** Maintenance/Repairs\
**Tags:** ford\
**Created:** [August 25, 2012, 6:37pm UTC](https://community.cartalk.com/t/2003-ford-mustang-high-idle-when-i-start/74283 "2012-08-25T18:37:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Kev1988](https://avatars.discourse-cdn.com/v4/letter/k/3be4f8/32.png) [@Kev1988](https://community.cartalk.com/u/Kev1988)\
**Post date:** [August 25, 2012, 6:37pm UTC](https://community.cartalk.com/t/2003-ford-mustang-high-idle-when-i-start/74283/1 "2012-08-25T18:37:03Z")

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I have a 2003 Ford Musang 3.8L v6 when I start my car for the first time of the day or after several hours of sitting the car idles high between 1000-1300 RPMS for appoximately 15-20 seconds after that it idles down to 600-800 rpms. I changed the spark plugs wires air filter not sure what else it could be no Check engine light. Any help would be appreciated.

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**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\
**Post date:** [August 25, 2012, 7:12pm UTC](https://community.cartalk.com/t/2003-ford-mustang-high-idle-when-i-start/74283/2 "2012-08-25T19:12:48Z")

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It sounds as though the system is operating just as designed.