Ford Focus Forum, Ford Focus ST Forum - View Single Post - ZX5 engine stumble when stopped, help!
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Old 11-16-2011, 01:44 PM   #13
Grinder
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Join Date: May 2011
Fan#: 85627
Location: Minneapolis, MN
What I Drive: 2003 CD silver SVT

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Hmmmm. Car ran fine until you put an intake on it. Now it runs like crap....... I dunno......maybe reinstall the factory airbox (after disconnecting the batt again) and see if your problem still persists.

If the car uses an airflow sensor to calculate fuel delivery and load, it would be important that the airflow through that sensor is capable of being properly sampled.
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