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Q: what are some symptons of a bad idle air control valve I think mine may be bad on 2006 Chrysler Town & Country

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
just replaced the alternator and belt tensioner hearing a noise from iac
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when I accelerate the wining gets louder /matches engine speed ,,, could it be a bad idler pulley making this noise ?
Yes, have it checked by a "mechanic". Easily tested for any drive belt system componet problems, mechanic will/should know what to do. You are not equipped to do this!!
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