Mechanics

MERCURY COUGAR ENGINE PROBLEM

2001 Mercury Cougar • 90,000 miles

I'm getting a loud air leak coming and going from the airbox. When idling I can make the noise happen @around 2000rpm and if I open the airbox the noise goes away. I have no engine lite. If I take the air filter out n close the airbox I get no noise. I would appreciate a response. Thank you.
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Guest
April 8, 2013.



Hearing a vacuum from the air box is normal. Fuel and air are drawn into the engine through there. Is the engine running properly?