Thread: mystery 'whirrrring' noise at stoplights...
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Old Feb 17, 2009 | 05:47 PM
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ImportLabSRT
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From: Elburn, IL
Default Re: mystery 'whirrrring' noise at stoplights...
This will happen when ever the M.E. sees a low oxygen level in the exhaust stream. It adds air to lower emissions.
 
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