VGT sticking? - Ford Powerstroke Diesel Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 06-26-2011, 04:58 PM Thread Starter
Compression Ignition Addict
 
majek5's Avatar
 
Join Date: Jun 2009
Posts: 816
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
VGT sticking?

On the way home pulling my toy hauler my CTS was showing the VGT at 85%. On the trip out on Friday, the % was moving up and down like it should. On the return trip it was boosting 10psi with the % being like 85. Then it "kicked in" and went down to 40% or so and was moving up and down with the boost at 20psi. All the time, no smoke and it was running fine. Is this a sticky turbo, or maybe a bad VGT? I have a turbo rebuild kit for when I tear into the EGR delete, oil cooler, ect.

2006 F350 CCLB KR FX4

stock...
majek5 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 06-26-2011, 06:55 PM Thread Starter
Compression Ignition Addict
 
majek5's Avatar
 
Join Date: Jun 2009
Posts: 816
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
BBBBUUUUMMMMPPPP

2006 F350 CCLB KR FX4

stock...
majek5 is offline  
post #3 of 5 Old 06-26-2011, 07:12 PM
Banned
 
Join Date: May 2009
Location: (518) on the boarder of MA+CT
Posts: 1,023
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to PowerstrokeTech82787
Turbo rebuild kit?

You mean a CHRA? or new impellar and turbine, shaft, unison ring and vanes?

Id tear it apart and clean it. And pull the vgt solenoid out and inspect that. Ive had one that i did a simple cleaning on and didnt pull the vgt solenoid out to inspect where the tip rides on the cam in the housing, had it come back with a 2263. Assumed it was an exhaust leak or something nope, pulled the vgt solenoid out and the tip had a rough and deep ridge worn into it...
PowerstrokeTech82787 is offline  
post #4 of 5 Old 06-26-2011, 07:14 PM
Member
 
Join Date: May 2009
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Yup. The PCM will continue to increase the duty cycle if it's not getting the response it thinks it should. The 85% you saw is max duty cycle. Once the turbo breaks free, you'll see the duty cycle fall off and boost pick up.
dieselmac is offline  
post #5 of 5 Old 06-26-2011, 07:22 PM Thread Starter
Compression Ignition Addict
 
majek5's Avatar
 
Join Date: Jun 2009
Posts: 816
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I didn't check for codes, but sounds like the turbo needs a good cleaning. It ran fine on the way down, but it sat for 2 days in the rain. Maybe the moisture was enough to freeze it up.

2006 F350 CCLB KR FX4

stock...
majek5 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome