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2003 Ford F-150 Lightning Question: Whats causing this noise?

 

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Im2fast4you, Beaumont, TX, February 08, 2012, 08:05
 Rookie

My 2003 lightning has a high pitch whistling noise(sounds like a tea kettle) coming from behind the supercharger a little to the right. It only does it idling or when im at a steady speed but when I accelerate it stops. What could this be?

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  • Answer #1

    February 08, 2012, 08:09
    Profile_thumbnail
     Master

    pcv elbow may have a vacuum leak causing this. common issue with these motors.

    Roy

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    Im2fast4you, February 08, 2012, 08:52
     Rookie

    Thanks and if not replaced soon could it cause more of a problem?

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    mastertech6371, February 08, 2012, 09:12
    Profile_thumbnail
     Master

    it will throw a code eventually. i would get it confirmed asap.

    Roy

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    Im2fast4you, February 09, 2012, 08:07
     Rookie

    where exactly is the pcv valve. is there a website i can go to?

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    CHautowerks, February 09, 2012, 08:53
     Enthusiast

    It is on the passenger side valve cover. There should be a sticker with a diagram under the hood.

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    Im2fast4you, February 10, 2012, 08:08
     Rookie

    It was the elbow thanks but when I took the hose off the intake I noticed just a little oil, was the elbow causing that or is it something else

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    CHautowerks, February 10, 2012, 12:28
     Enthusiast

    That is normal due to wear in the pcv valve just replace the valve

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  • Answer #2

    CHautowerks from CH Autowerks, February 08, 2012, 09:30
     Enthusiast

    It sounds like a boost or vacuum leak

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