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A EGR valve can stick 'open' due to carbon build-up and although is may seem a fluke, it will stick open again causing the rough idle that you had before. Chances are it will get worse, so I would recommend that you do replace it. I hope this helps you. Mark

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โˆ™ 2005-11-29 01:52:51
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Q: Why did the EGR valve for the 2000 Ford Windstar start to work again just before bringing it in to be fixed?
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