# Rough idle ford windstar

**URL:** <https://community.cartalk.com/t/rough-idle-ford-windstar/90158>\
**Category:** Maintenance/Repairs\
**Created:** [June 2, 2015, 10:00pm UTC](https://community.cartalk.com/t/rough-idle-ford-windstar/90158 "2015-06-02T22:00:54Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![dodge330](https://avatars.discourse-cdn.com/v4/letter/d/ec9cab/32.png) [@dodge330](https://community.cartalk.com/u/dodge330)\
**Post date:** [June 2, 2015, 10:00pm UTC](https://community.cartalk.com/t/rough-idle-ford-windstar/90158/1 "2015-06-02T22:00:54Z")

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I have 2000 ford windstar with 3.8 engine. I have been reading up on the idle problems with these vans. However, most responses are in regard to the engine stalling and/or it trips a code. My does not do this. Sometimes the idle is rough and other times everything is smooth. I am thinking it may be an egr valve or dpfe valve. What do you guys think?

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**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\
**Post date:** [June 3, 2015, 2:02am UTC](https://community.cartalk.com/t/rough-idle-ford-windstar/90158/2 "2015-06-03T02:02:44Z")

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I think with no codes being thrown gas pump. Regular maintenance is up to date?

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**Author:** ![dodge330](https://avatars.discourse-cdn.com/v4/letter/d/ec9cab/32.png) [@dodge330](https://community.cartalk.com/u/dodge330)\
**Post date:** [June 3, 2015, 5:36am UTC](https://community.cartalk.com/t/rough-idle-ford-windstar/90158/3 "2015-06-03T05:36:45Z")

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yes regular maintenance up to date plus. Checked fuel pressure and it is within limits

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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 3, 2015, 5:54am UTC](https://community.cartalk.com/t/rough-idle-ford-windstar/90158/4 "2015-06-03T05:54:38Z")

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The problem might be caused from a faulty Idle Air Control valve.

A faulty IAC valve won’t always cause the engine to stall, or cause the Check Light to come on.

Try the quick test for a faulty Ford IAC valve.

With the engine hot and idling, take the handle of a screwdriver and rap on the IAC valve. If the engine idle speed changes when doing this, replace the IAC valve.

Tester

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**Author:** ![dodge330](https://avatars.discourse-cdn.com/v4/letter/d/ec9cab/32.png) [@dodge330](https://community.cartalk.com/u/dodge330)\
**Post date:** [June 3, 2015, 6:09am UTC](https://community.cartalk.com/t/rough-idle-ford-windstar/90158/5 "2015-06-03T06:09:25Z")

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thank’s tester for your advice. I will try the test tomorrow

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**Author:** ![dodge330](https://avatars.discourse-cdn.com/v4/letter/d/ec9cab/32.png) [@dodge330](https://community.cartalk.com/u/dodge330)\
**Post date:** [June 4, 2015, 6:16am UTC](https://community.cartalk.com/t/rough-idle-ford-windstar/90158/6 "2015-06-04T06:16:27Z")

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Tester it worked! I purchased a new iac valve and the idle is good. Thank’s again