Question about 2003 Ford Focus

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Failed exceleration, engine jerks when driving, Added engine treatment with last trip to gas station and that didn't help, Now, the check engine light has come on.

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Check pcv hose from the intake manifold for collapsing and leaking. Check while engine is running if it is leaking it will cause the light to come on. Also a dirty air flow sensor will cause a lack of power. Check ign coil for cracks along the sides also.

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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