Notices
6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

diagnosis please

Thread Tools
 
Search this Thread
 
Old Jun 17, 2011 | 10:55 AM
  #1  
Texas450's Avatar
Texas450
Thread Starter
|
Senior User
Joined: Aug 2010
Posts: 312
Likes: 0
diagnosis please

What's up guys ....right now im in corpus christi and have noticed my truck is letting off a very high pitched noise sounding when I press the pedal from a stand still. When im idle it doesn't make the noise. My turbo has never made this high pitch noise before ....is my turbo going out??? The turbo is lagging but there as always been a delay. Power I think is the same and mpg is same from what I can tell.....

Thoughts please

Tex
 
Reply
Old Jun 17, 2011 | 11:24 AM
  #2  
parkland's Avatar
parkland
Lead Driver
Joined: Jan 2006
Posts: 6,267
Likes: 5
Making normal boost?
 
Reply
Old Jun 17, 2011 | 11:33 AM
  #3  
Texas450's Avatar
Texas450
Thread Starter
|
Senior User
Joined: Aug 2010
Posts: 312
Likes: 0
Yes it is....just sound horrible .....belt maybe?....... but if it was the belt shouldnt it make the noise when I am idle and pressing the gas?
 
Reply
Old Jun 17, 2011 | 11:40 AM
  #4  
senix's Avatar
senix
Super Moderator
15 Year Member
Liked
Loved
Top Answer: 1
Joined: Aug 2008
Posts: 37,375
Likes: 1,860
From: Frederick, MD
Club FTE Gold Member
I would tend to think under load the belt has a better chance to squeal.

As far as turbo goes they have been pretty dependable.

Might just take a gander at the intake tubes. Shine a light in there and see if there is anything that you can see trouble wise.

Also shine a light all around the outside of the turbo, verify if there are any leaks at the oil lines that feed the turbos.
 
Reply
Old Jun 17, 2011 | 03:28 PM
  #5  
bnmccoy's Avatar
bnmccoy
Elder User
Joined: Aug 2004
Posts: 932
Likes: 4
From: Edmond, OK
Club FTE Silver Member

I take it the noise is only when accelerating? Coincides with making boost?

If you had a 6.0 I would suggest you have blown head gasket(s) and the noise is the squeal of excess coolant system pressure escaping from the degas bottle cap.

I wouldn't expect same from a stock 6.4 though; nor did you mention any coolant issues. Everything okay level wise under the hood for both coolant systems?

Hopefully it is just the belt slipping.

Good luck,

Bob
 
Reply
Old Jun 17, 2011 | 03:47 PM
  #6  
Texas450's Avatar
Texas450
Thread Starter
|
Senior User
Joined: Aug 2010
Posts: 312
Likes: 0
The truck is not stock...it has a dpf delete and programmer with a cold air induction. All fluid levels are just fine and normal levels..... the problem only seems to happen when I accelerate... I am making more black smoke then is normal... I assure you I do not a hot rod my vehicle as this is my office.... I do you feel like I have some power loss.... at highway speed I do not hear the noise anymore but I feel as if I can't get up and go when I need you
 
Reply
Old Jun 17, 2011 | 04:20 PM
  #7  
Texas450's Avatar
Texas450
Thread Starter
|
Senior User
Joined: Aug 2010
Posts: 312
Likes: 0
Originally Posted by Texas450
The truck is not stock...it has a dpf delete and programmer with a cold air induction. All fluid levels are just fine and normal levels..... the problem only seems to happen when I accelerate... I am making more black smoke then is normal... I assure you I do not a hot rod my vehicle as this is my office.... I do you feel like I have some power loss.... at highway speed I do not hear the noise anymore but I feel as if I can't get up and go when I need you
Voice text sucks....the last word is supposed to say ...to
 
Reply
Old Jun 17, 2011 | 06:25 PM
  #8  
cheezit's Avatar
cheezit
Post Fiend
15 Year Member
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
Club FTE Silver Member

broken y-pipe is a possible as well
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Jun 18, 2011 | 09:59 AM
  #9  
Texas450's Avatar
Texas450
Thread Starter
|
Senior User
Joined: Aug 2010
Posts: 312
Likes: 0
What is the y-pipe? And is that major?
 
Reply
Old Jun 18, 2011 | 10:33 AM
  #10  
bushman134's Avatar
bushman134
Freshman User
Joined: Aug 2010
Posts: 42
Likes: 0
From: florida
Check the rubber boots on the turbos might be a small leak there or a crack in one of them. just a guess but have heard of this before
 
Reply
Old Jun 18, 2011 | 04:53 PM
  #11  
bnmccoy's Avatar
bnmccoy
Elder User
Joined: Aug 2004
Posts: 932
Likes: 4
From: Edmond, OK
Club FTE Silver Member

Originally Posted by Texas450
What is the y-pipe? And is that major?
It is the 'Y' formed where the two pipes from the exhaust manifolds come together before connecting to the turbo.

Cheezit works on them daily; so he knows what he suggests
 
Reply
Old Jun 18, 2011 | 09:06 PM
  #12  
bigcountryfs's Avatar
bigcountryfs
New User
Joined: Feb 2011
Posts: 13
Likes: 0
i have a 2008 f-350 4x4. mine had the same squeal during acceleration, the down pipe from turbo to exhaust between motor and firewall was cracked.
 
Reply
Old Jun 18, 2011 | 09:08 PM
  #13  
Texas450's Avatar
Texas450
Thread Starter
|
Senior User
Joined: Aug 2010
Posts: 312
Likes: 0
Originally Posted by bigcountryfs
i have a 2008 f-350 4x4. mine had the same squeal during acceleration, the down pipe from turbo to exhaust between motor and firewall was cracked.
Was that pricey???
 
Reply
Old Jun 18, 2011 | 11:47 PM
  #14  
66stang351's Avatar
66stang351
Elder User
Joined: Mar 2006
Posts: 516
Likes: 1
Originally Posted by Texas450
Was that pricey???
Good excuse to get a better than stock one if it is the problem... AFE Mach Force XP Race Down Pipe Upgrade 49-43025
 
Reply
Old Jun 19, 2011 | 07:22 PM
  #15  
bigcountryfs's Avatar
bigcountryfs
New User
Joined: Feb 2011
Posts: 13
Likes: 0
i was told they needed to pull cab to make it much easier, some might do it without pulling it. luckily mine was still under warranty.
 
Reply



All times are GMT -5. The time now is 04:35 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE