# 2004 Ford Taurus lunges when brakes are applied

**URL:** <https://community.cartalk.com/t/2004-ford-taurus-lunges-when-brakes-are-applied/172850>\
**Category:** Maintenance/Repairs\
**Tags:** ford, taurus\
**Created:** [November 30, 2020, 7:43pm UTC](https://community.cartalk.com/t/2004-ford-taurus-lunges-when-brakes-are-applied/172850 "2020-11-30T19:43:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![cac8069](https://avatars.discourse-cdn.com/v4/letter/c/7ba0ec/32.png) [@cac8069](https://community.cartalk.com/u/cac8069)\
**Post date:** [November 30, 2020, 7:43pm UTC](https://community.cartalk.com/t/2004-ford-taurus-lunges-when-brakes-are-applied/172850/1 "2020-11-30T19:43:08Z")

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2004 ford taurus lunges and speeds engine up when brakes applied

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [November 30, 2020, 9:45pm UTC](https://community.cartalk.com/t/2004-ford-taurus-lunges-when-brakes-are-applied/172850/2 "2020-11-30T21:45:20Z")

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Vacuum leak? Yet **no** CEL?

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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:** [December 1, 2020, 4:35pm UTC](https://community.cartalk.com/t/2004-ford-taurus-lunges-when-brakes-are-applied/172850/3 "2020-12-01T16:35:39Z")

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Locate the Idle Air Control valve on the throttle body.

 ![image](https://global.discourse-cdn.com/cartalk/original/3X/b/c/bc195819efe88441396dcf59dd5cdc629e64aaa5.jpeg)

With the engine hot/idling, take the handle of a screwdriver and tap on the IAC valve.

If the engine idle speed changes or the engine stalls, replace the IAC valve.

Tester