"Vortex" Whirring Sound

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Apr 13, 2004 | 03:11 PM

Brettman

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Joined: Apr 2004

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"Vortex" Whirring Sound

The problem - When my 99 4.0L Ranger gets in hotter weather, the air box (right at the mass air sensor) begins this whirring sound like a vortex of air. Replaced the MAS and still makes the noise. Now that spring and summer are approaching the vehicle will begin the noise again. Any thoughts or ideas as to what is going on and what I can do to remedy the noise?

Brettman

Apr 13, 2004 | 05:03 PM

87 XLT

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Joined: Oct 2003

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From: SoCal

Might be a noisy IAC. Check out the "technical information sticky" & click on "4.0 idle air control valve"

Apr 13, 2004 | 05:12 PM

WXboy

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Joined: Sep 2002

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From: Central KY

Yup it's probably the IAC valve. I swapped mine out on the '99 I had and it cured the problem.

Apr 13, 2004 | 05:23 PM