Question about 2004 Honda Accord

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Air intake loud "humming" noise

On our 2003 Honda Accord we get a rather loud humming noise. Problem started a few months ago, did not happen before that. Dealer service can find nothing wrong with air filter, or throttle body, or any indicators. I took the air filter cover off, and the noise originates in the top of the cover, not the filter itself. If I disconnect the filter cover top from the throttle body, noise is gone. Reconnect and it returns. Like some sort of "harmonic resonance". Can hear it for about a second after engine is turned off.

Any ideas?

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Check to make sure nor of you vaccum line is not loose and all your clamps are tighten sound line a line is off the system and your intake is not tighten properly

Posted on Jul 01, 2009

  • TAVO
    TAVO Mar 06, 2015

    I have the same problem, found Air intake Duct cracked underneath. Thanks!


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Did it happened after air filter change ? maybe try to use different filter brand

Posted on Oct 17, 2009

  • tapkrisko Oct 17, 2009

    i mean - use less restrictive air filter


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