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Upon start up, engine runs rough until driving 10 minutes or so.

(2001 Ford Focus)
in San Francisco, CA on May 09, 2011
I drive my car seldom [twice a week]. All city driving, maybe 25 miles a week. I use synthetic oil.
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Popular Answer
on May 09, 2011
No check engine light? I say check the plugs and search for vacuum leaks. As the parts heat up they expand a seal up gaskets that leak when cold. Start and let us know. Good luck.
of Dana Meyer Auto Care on May 09, 2011
There are some vacuum lines that corode from oil and there are cold idle systems that should raise the idle until the engine systems warm up... sounds like we need more information to give a better answer...
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