Whistle under the hood - Ford Powerstroke Diesel Forum

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post #1 of 15 Old 01-07-2013, 09:35 AM Thread Starter
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Whistle under the hood

So let me see if i can explain this in writing...

The other day i noticed a Whistle type noise from my truck after i let off the gas and it also does it if i give it gas. its not really loud but enough i can hear it in the cab. Any one ever had this happen? The truck doesnt run any different or miss or anything eles that is making me think its going to blow up or something. Just want to see if anyone has had this happen. I want to get it fixed before riding season comes along and i start pulling trailers all over to go ride.

Thanks

and its a 04 with sct tuned and 4in from the turbo back.

2004 6.0 Lifted 8 in 37x14.5x20 inch tires
mods so far:
SCT W/ Tunes
4 in from the turbo back.
Glow shift gauges EGT Boost and Trans temp
HID Headlights
HID Foglights
EGR Delete
03 Turbo
Studs and Gaskets
Coolant Filter Kit
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post #2 of 15 Old 01-07-2013, 09:38 AM Thread Starter
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after doing some reading some are saying it Coolant Bottle Cap

2004 6.0 Lifted 8 in 37x14.5x20 inch tires
mods so far:
SCT W/ Tunes
4 in from the turbo back.
Glow shift gauges EGT Boost and Trans temp
HID Headlights
HID Foglights
EGR Delete
03 Turbo
Studs and Gaskets
Coolant Filter Kit
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post #3 of 15 Old 01-07-2013, 09:58 AM
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Yeah degas bottle cap, is it a motor craft cap?

I put a brand new fomoco cap on and it puked from day one. I went and got an aftermarket


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post #4 of 15 Old 01-07-2013, 10:05 AM Thread Starter
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yea its the stock cap.

2004 6.0 Lifted 8 in 37x14.5x20 inch tires
mods so far:
SCT W/ Tunes
4 in from the turbo back.
Glow shift gauges EGT Boost and Trans temp
HID Headlights
HID Foglights
EGR Delete
03 Turbo
Studs and Gaskets
Coolant Filter Kit
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post #5 of 15 Old 01-07-2013, 03:09 PM
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Is your eot ect normal?

-DANIEL-
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post #6 of 15 Old 01-08-2013, 05:18 AM
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Could be this, read on down....fords doing my studs( pics )

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Unfortunately had to Sell my ......2004 KR CC SWB FX4 - Edge insight cts, blue spring upgrade, updated HFCM drain plug, XDP coolant filter, CAT EC-1 rated coolant, Custom Diesel EGR delete, CAT delete, Rotella T6

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post #7 of 15 Old 01-08-2013, 06:49 AM
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Had the same whistle.
Leaking head gaskets for me.

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post #8 of 15 Old 01-08-2013, 07:08 AM Thread Starter
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i hope its not that! im going to get them done but not until my tax money comes in.

2004 6.0 Lifted 8 in 37x14.5x20 inch tires
mods so far:
SCT W/ Tunes
4 in from the turbo back.
Glow shift gauges EGT Boost and Trans temp
HID Headlights
HID Foglights
EGR Delete
03 Turbo
Studs and Gaskets
Coolant Filter Kit
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post #9 of 15 Old 01-11-2013, 06:02 AM Thread Starter
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Ive also noticed that it only does it after the truck has warmed all the way up. I need to go find a new cap and see if that its or not i guess.

2004 6.0 Lifted 8 in 37x14.5x20 inch tires
mods so far:
SCT W/ Tunes
4 in from the turbo back.
Glow shift gauges EGT Boost and Trans temp
HID Headlights
HID Foglights
EGR Delete
03 Turbo
Studs and Gaskets
Coolant Filter Kit
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post #10 of 15 Old 01-14-2013, 05:06 AM Thread Starter
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Ok so to fix this do i need to get a cap form ford or is this something i can get from a atuo parts store?

2004 6.0 Lifted 8 in 37x14.5x20 inch tires
mods so far:
SCT W/ Tunes
4 in from the turbo back.
Glow shift gauges EGT Boost and Trans temp
HID Headlights
HID Foglights
EGR Delete
03 Turbo
Studs and Gaskets
Coolant Filter Kit
007.3Powerstroke is offline  
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