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Q: i hit the gas on car and it makes a short hum sound by air filter what cud it b on 2001 Mercury Cougar

it sounds like it is coming from the intake but im not to sure and the sound is very frequent especially when im driving or in idle
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would the iac motor cause my car to stall out coming to a complete stop or when i put car in park? and would it be better to just get a new car with the iac problem or is it a fix for a decent price
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