I have a 2008 crew cab with about 3,00 miles on it. Sometimes when your in a certain rpm range it whistles like a throttle body spacer. Does anybody else have this noise. It is ridiculous;y annoying because it happens around about 35-40 mph which is the speed I normally drive at. Thanks for the help guys

 

My 02 will do it too, so it's normal. But I really have to be on the gas hard and rpms high to make that noise.

 

Mine does it, but only when its really cold out.

 

I think it's just the harmonics cold air is more dence than hot, so your probably hearing the engine just sucking air in, my 2000f150 my friends 2003 f150 and his dad's f150 do ll the same thing, it got down to -40 degreese celcius here and it was a non stop loud whistle, when i was on the gas, i mean like loud,

 

When I hear it that means I'm in a racing mood.

Like Snow White and the 7 drunks............ whistle while you work

 

thats right, she's just begging for more, so give it to her!

 

Throw a little paint thinner on your rubber connections @ the TB/Plenum. Behind the intake as well. That seals them. - Ford Service.

Could also be a grommet incorporated into the firewall. You should be able to determine the difference over RPMs.

 

maybe its just a cam whine. my dads truck has a cam whine

 

mine has a whistle too its a 1997

 

Could be mechanical/normal. It easy enough to check lines if you want with a cheap little mini vac. But you can only check the line itself before the connection to metal components. Unless you have a way to cap the flow internally.

All I know, before using the paint thinner method, some lines will pull off easy. After applying thinner, it's a b^tch getting them lines off - It works. Better than clamps IMO.

 

TSB 08-4-2

COLD START FEAD HOOT - WHISTLE NOISE / BUILT BEFORE 1/28/2008

Publication Date: February 7, 2008

FORD: 2007-2008 Mustang, Expedition, Explorer Sport Trac, Explorer, F-150, F-150
LINCOLN: 2007-2008 Mark LT, Navigator
MERCURY: 2007-2008 Mountaineer


ISSUE:
Some 2007-2008 F-150, Mustang vehicles equipped with a 4.6L and 5.4L engine; 2007-2008 Mark LT, Expedition, Navigator vehicles equipped with a 5.4L engine; Explorer, Mountaineer, Explorer Sport Trac vehicles with 4.6L engine and built before 1/28/08, may exhibit a front end accessory drive (FEAD) related high-pitched metallic whistle/hoot noise after a cold soak in ambient temperatures below 40 °F (4.4 °C). This noise may be caused by the grooved nylon FEAD idler pulley.

ACTION:
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

NOTE: FEAD IDLER PULLEY NOISE MAY BE MOST APPARENT AT OR NEAR COLD ENGINE IDLE SPEEDS (APPROXIMATELY 1200 RPM). NOISE DURATION IS LESS THAN 10 MINUTES AFTER STARTUP AND WILL BE ELIMINATED WITH FEAD BELT REMOVED.



Replace the nylon FEAD idler pulley, refer to Workshop Manual, Section 303-05.

PART NUMBER PART NAME
6L3Z-6C348-A Idler Pulley

 

Damn! - I wouldn't have thought of that :o

Good Post !

 

hey thanks guys i kinda thought it was the cold air, i used to have an 03 ranger FX4 II with an airaid throttle body and it sounded like that when u got on it.

 

X2 with my 2000 Lariat

 

The 2000 is different, it's like my 98. It use to do that until I Amsoiled the power steering.