i am still stumped! ok today it made a lite whistling! Stupid KIA! belts are fine! i am beginning to think its the fan in front. Heres the deal. Tonite, i was behing a semi and it made a horrible noise, so i passed it, it went to a slight whistling noise, and after i passed, the noise went away. I am so confused! Why is it just my KIA????

2001 Tan Kia Sportage, has a K&N air filter, Warn Hubs but there's nothing really special about it, but my 7 year old loves my KIA cuz she sits up high!