upon start up, engine runs rough until driving 10 minutes or so. on 2001 Ford Focus

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I drive my car seldom [twice a week]. All city driving, maybe 25 miles a week. I use synthetic oil.
(2) Answers
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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.
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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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