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1996 Ford Thunderbird Question: howling/humming noises



, 4.6L V8, Campbellsville, KY, May 29, 2011, 22:53

My T-bird has a tendency to make loud howling noises intermittently when idling and sometimes at speed, when it does so during idling, it often stalls, no indicator lights are on and all the auges read normal

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  • Answer #1

    May 30, 2011, 01:38

    I have an idea -- The noise, sometimes described a "hooting" noise, would be a sticking idle air control valve. This is not terribly uncommon. The noise is basically the resonating of the buzzing of the sticking valve amplified through the intake manifold and air box.

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