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Honda Civic LX

Why would a 1989 Honda Civic LX that starts up fine idles very rough until it warms up?

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2005-08-31 00:57:33
2005-08-31 00:57:33

This is most likely a cold air idle valve which is stuck closed. This is located on the throttle body. You could take it off, clean it and reassemble it, or just pull one out of the junk yard, they usually don't go bad until 200000+ miles.

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