Question about 1994 Honda Civic
Hi, have you looked for a vacuum leak around engine you should be able to hear a hissing sound if you have a vacuum leak. If no vacuum leak, try unplugging your idle air valve,if it idles down to normal replace or take off and clean very good. If i can help you more just re post
Posted on Jan 04, 2011
Check the level of coolant. I know it sounds silly, but coolant runs through the throttle body. If you are low on engine coolant it will cause an idle surge. A vacuum leak would cause a constant high idle situation
Posted on Aug 04, 2012
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Posted on Jan 02, 2017
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