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?
Ford Q&AAsk Your Question
2003 Ford F-150 Lightning Question: Whats causing this noise?
Answer #1mastertech6371 February 08, 2012, 08:09Master
pcv elbow may have a vacuum leak causing this. common issue with these motors.
ReplyIm2fast4you, February 08, 2012, 08:52Rookie
Thanks and if not replaced soon could it cause more of a problem?
Replymastertech6371, February 08, 2012, 09:12Master
it will throw a code eventually. i would get it confirmed asap.
ReplyIm2fast4you, February 09, 2012, 08:07Rookie
where exactly is the pcv valve. is there a website i can go to?
ReplyCHautowerks, February 09, 2012, 08:53Enthusiast
It is on the passenger side valve cover. There should be a sticker with a diagram under the hood.
ReplyIm2fast4you, February 10, 2012, 08:08Rookie
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
ReplyCHautowerks, February 10, 2012, 12:28Enthusiast
That is normal due to wear in the pcv valve just replace the valve
Answer #2CHautowerks from CH Autowerks, February 08, 2012, 09:30Enthusiast
It sounds like a boost or vacuum leak