# Corsica white

**URL:** <https://community.cartalk.com/t/corsica-white/38467>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, corsica\
**Created:** [October 22, 2009, 7:23pm UTC](https://community.cartalk.com/t/corsica-white/38467 "2009-10-22T19:23:28Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![allen41](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@allen41](https://community.cartalk.com/u/allen41)\
**Post date:** [October 22, 2009, 7:23pm UTC](https://community.cartalk.com/t/corsica-white/38467/1 "2009-10-22T19:23:28Z")

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i have a 95 3.1 corsica and it runs smooth except that the engine surges slightly at idle and sometimes even dies what can cause this thanks

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [October 22, 2009, 7:25pm UTC](https://community.cartalk.com/t/corsica-white/38467/2 "2009-10-22T19:25:34Z")

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IAC circuit. There are other possibilities, but that’s a good place to start.

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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 22, 2009, 7:29pm UTC](https://community.cartalk.com/t/corsica-white/38467/3 "2009-10-22T19:29:23Z")

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Relatedly you can look for vacuum leaks - the first suspect is unmetered air into the intake - IAC problems will do that as will vacuum leaks.

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**Author:** ![allen41](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@allen41](https://community.cartalk.com/u/allen41)\
**Post date:** [October 23, 2009, 7:04am UTC](https://community.cartalk.com/t/corsica-white/38467/4 "2009-10-23T07:04:01Z")

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thanks guys i never thought of that ill try it and get back in a couple days

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**Author:** ![allen41](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@allen41](https://community.cartalk.com/u/allen41)\
**Post date:** [October 23, 2009, 7:13am UTC](https://community.cartalk.com/t/corsica-white/38467/5 "2009-10-23T07:13:55Z")

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was wondering if spraying it down with carb cleaner will do anything thanks

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [October 23, 2009, 8:15am UTC](https://community.cartalk.com/t/corsica-white/38467/6 "2009-10-23T08:15:18Z")

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Or, you could use a propane torch (unlit, of course). With the engine idling, play the propane around areas where a vacuum leak can occur. If the rpm goes up, you’ve found a vacuum leak.  
Be sure to check the large air intake tube for cracks and proper sealing.

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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 23, 2009, 12:00pm UTC](https://community.cartalk.com/t/corsica-white/38467/7 "2009-10-23T12:00:51Z")

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Not sure what you’re planning to spray down. My preferred method to search for intake leaks is described below by hellokit. I’d use intake or carb cleaner to clean out the IAC valve - it will need to be removed for that.

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**Author:** ![allen41](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@allen41](https://community.cartalk.com/u/allen41)\
**Post date:** [October 24, 2009, 4:07am UTC](https://community.cartalk.com/t/corsica-white/38467/8 "2009-10-24T04:07:33Z")

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the iac was the problem thanks guys