Question about 2003 Honda Civic
You could have a loose bolt on your exhaust manifold (this happens sometimes with Japanese cars with little reason behind it). If you can, try tightening all of the bolts on the manifold and see if that helps. If you are not very mechanically inclined and tightening the bolts does not totally resolve the issue, I recommend taking it to a mechanic -- just mention that you think it is the exhaust manifold, or the exhaust manifold seal. If the seal is worn out, you should have it replaced and that should resolve your issue.
The reason it only happens at idle is that the engine has a specific vibration to it at low RPM's ... this is a different vibration than when driving ... stepping on the gas also increases the pressure in the exhaust system, minimizing the vibrations. You should be able to get it fixed for a pretty low price, but I would recommend doing it soon so you do not allow collateral damage to the rest of your exhaust system.
Posted on May 27, 2011
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Posted on Jan 02, 2017
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