Whistling noise
04-12-2013, 11:26 AM
#42
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I had the same problem and my mechanic took it and thought it was a pulley checked all of them and wasn't it. Thought it could be the altenator checked it and it was good. Then we moved on to the throttle body and changed everything out and still heard the noise. Checked all the vacuum lines and couldn't find anything. He was scratching his head and we started calling around and then we found the problem on mine at least. It was the vacuum line on the 4WD and it was causing it to try to engage when the RPM's got up there wasn't enough vacuum to keep it from engaging. Changed that out and never had another problem. Hope that helps!!
EB
EB
04-13-2013, 08:45 AM
#43
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thanks for the response but...
glad you found the problem out on yours. Only prob.is that mine is 2wd..does mine still have the same vacuum cables? Mine only doess it when it's below freezing and at certain rpms, basically when its about to upshift at high rpms. Idk maybe ill sort it out next winter..
04-13-2013, 10:25 AM
#44
Senior Member
glad you found the problem out on yours. Only prob.is that mine is 2wd..does mine still have the same vacuum cables? Mine only doess it when it's below freezing and at certain rpms, basically when its about to upshift at high rpms. Idk maybe ill sort it out next winter..
02-01-2014, 12:27 PM
#46
Serpentine pulley bearing
Mine seems to be a cold weather problem near the 2000 rpm speed and/or at cruise 62-64 mph. The belt tension pulleys seem to be okay and all vacuum hoses seem to be connected and in good condition. My F150, 4X4 is 2004, 5.4L with auto with just over 70k miles (mostly highway miles.) The temperature range with the problem has been 14 above and down to -15 degrees. The problem just stated this year. I had new tires, brakes and a new die-hard battery installed in 2009, two summers and one winter ago. The noise started just two weeks ago. I have visited a technical college and the instructor test drove the F150, he owns one also, and found the noise during acceleration, near 2000 rpm, and with cruise set. The sound would go away by backing off on the pedal, but return when speed is resumed. No noise in the shop only seems to be there under load.
A parts store mechanic dealer said that he suggests that the serpentine belt be replaced along with the belt tension pulleys. I am still using the original belt and pulleys.
Another person suggested the rear bearing of the alternator.
The only thing that I did so far was to added a can of Sea Foam to the fuel. I don’t really have any good idea of what to do. I am open to recommendations.
A parts store mechanic dealer said that he suggests that the serpentine belt be replaced along with the belt tension pulleys. I am still using the original belt and pulleys.
Another person suggested the rear bearing of the alternator.
The only thing that I did so far was to added a can of Sea Foam to the fuel. I don’t really have any good idea of what to do. I am open to recommendations.
My truck made a loud off and on again tea kettle whistle noise. Thought it was the air filter tray not sealed correctly. Then I thought it was my alternator because the noise changed to a more whining sound. Turns out it was the serpentine belt tension pulley bearing was completely shot and even hard to turn. Replaced it today and now the engine is as quiet as a church mouse. Finally!
Video link on how to find and repair this noise
http://www.fordf150.net/forums/viewt...?f=31&t=114199
Last edited by Jeff50; 02-01-2014 at 10:38 PM. Reason: Video link on how to find and repair this noise
02-01-2014, 12:28 PM
#47
Belt tension pulley bearing
I have an 04 F150 STX 2wd, 4.6L, auto, 77,000 miles. During acceleration I'm hearing a whistling noise coming from under the hood. It starts out as a low pitch whistle that gets louder and higher pitch approaching each shift point, and remains steady during cruise between 50 and 70 mph. It goes away if I let off the accelerator, but comes right back as soon as the rpms start increasing. It sounds like an air leak, but it doesn't seem to affect performance or operation of any other systems. The engine compartment is clean and all components and hoses seem to be in good condition. There are no mods, so everything is factory stock under the hood.
03-13-2015, 09:48 AM
#48
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Whistle noise from behind dash
Hey guys, I had this whistle noise on my 05 fx4. It drove me nuts, It started after my #4 injector stuck open and my truck went to the dealer to be repaired. When I picked it up every time I went over 2000rpm it made a whistle noise. I took it back and they tried to tell me it was a Manifold leak. I took it to a local exhaust shop and as soon as he heard it he said it was a bad cat. Well the dealer tested the Cats and said they were fine. Exhaust guy replaced the cat and WOW whistle is gone. Going to complain to the dealer but guessing it won't help.
03-13-2015, 11:52 AM
#49
A buddy of mine gave me his Ford Oasis login information and I remember seeing a TSB on this same subject. I can't remember what it said, and he no longer works for Ford, but if memory serves me correct it wasn't anything major. I have the same issue. 07 4.6 XLT.
I just tell everyone its my turbo kicking in.
I just tell everyone its my turbo kicking in.
03-23-2015, 05:23 PM
#50
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2007 Ford F150, i've got a whistle, sounded like a squealing belt, ran truck without belt on and still makes noise. sounds like its from the rear of the engine when i crawl under it, around the transmission, could possibly be the cat. Stutters or hesitates under heavy load (hard acceleration/up hill), anyone find out where the trany vent was?