Whistle noise 99 F250? - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 03-12-2007, 07:30 AM Thread Starter
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Whistle noise 99 F250?

I have an odd whistle noise coming form somewhere when I get on the throttle. I don't believe it's from the motor. It won't do it in neutrel or park when i rev it up. It sound like a low pitched fire whistle and it gets worse with more rpm but only when it's gear and moving. When it upshifts and the rpm's drop it quiets down till you pic up rpm's again. Anybody got any ideas?
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post #2 of 8 Old 03-12-2007, 08:01 AM
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this is your turbo spooling up. the way you described it it sounds like your turbo., its totally normal. please fill out your sig. and let us know how much diesel experiance you have. thanks and welcome to the org.

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7.3l 99 f-250 SD
4 INCH TURBO BACK TO 6 INCH MITER CUT STACKS CURIOSTY OF GRAND ROCK AND COWBOY DIESEL PERFORMANCE.
TS 6 POSTION CHIP. stock,high idle,50,75,100,140hp.
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post #3 of 8 Old 03-12-2007, 08:25 AM
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It's your turbo. Great sound isn't it? I LOVE hearing mine spooL!!!


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post #4 of 8 Old 03-12-2007, 08:27 AM Thread Starter
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It's definately not coming from the turbo. You can hear the turbo as well as this at the same time. It's more of a high pitched whistle than the turbo. It just started doing this last night and sounds totally different than the turbo. It almost sounds like a dry bearing. Also what should you put in your sig? That's why I never filled it out?
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post #5 of 8 Old 03-12-2007, 09:00 AM
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It might be a IC boot leaking... Check all of your the connections from the turbo to the Intercooler, and from the intercooler to the intake.

As far as what to put in your signature... everybody does it a little different, but to me the essentials are Model year, and a little background of what your truck is... ie: trans, drw?, plus what mods you have done.

This kind of information makes it much easier for folks to help you figure out problems when you have them... and keeps you from having to type in that information everytime.

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post #6 of 8 Old 03-12-2007, 01:14 PM
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Yeah, I had a leak on mine for a while, sounded more like air surging though.

Check all the clamps at the connections that boost travels through before entering the heads - particullary the clamps under the plenum.
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post #7 of 8 Old 03-12-2007, 07:04 PM
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Yup, sounds like a leak in one of the boots to me too, and you will only get it when your under power, may be a small crack in the boot, or it could be one has come a little lose. Just check all the clamps that hold the boots on, including the ones on the Y manifold ( red ) and you should find it.

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post #8 of 8 Old 03-13-2007, 05:53 AM Thread Starter
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I think we found the problem. It's coming from the tranny. We think the tranny pump is making the whistle/whine noise. How long do you guys think it will last? It has 120,000 miles on it.

99 F250 Ext Cab 4x4 Auto
4" turbo back dual exhaust
AFE Stage 2 intake
Auto Meter Gauge
GDS Ball Buster Turbo
6.0 intercooler
Dfuser 18K module
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FASS 150
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Studded, springs, pushrods
Adrenline HPOP
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PowerSlot Rotor n Hawk Pads
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