No boost - Ford Powerstroke Diesel Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 7 Old 12-22-2011, 04:32 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Oct 2011
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
No boost

I got a friend with a 95 7.3. For some reason he is not able to build boost his a mechanic said that this bolt controlling his blow off is the wrong size. does anyone know the diameter of this bolt or the length?

Sent from my SPH-M820-BST using AutoGuide.Com Free
Strokeitbig is offline  
post #2 of 7 Old 12-22-2011, 12:52 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Oct 2011
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
mechanic was very vague in his description. I'm guessing the ok he is talking about is on the waste gate it is used to determine at which psi the waste gate opens to let blow off
Sent from my SPH-M820-BST using AutoGuide.Com Free
Strokeitbig is offline  
post #3 of 7 Old 12-22-2011, 01:01 PM
Powerstroke Techie

 
justinmix's Avatar
 
Join Date: May 2011
Location: Frederick MD.
Posts: 1,975
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 10 Times in 10 Posts
Feedback Score: 0 reviews
94-97 7.3's don't use a waste gate. The do have a exhaust back pressure valve built into the turbo it's only used to choke up the engine to warm it up when cold. Unless that's stuck closed it should have nothing to do with boost.

Sounds like he doesn't really know what he's talking about or you misunderstood him.
justinmix is offline  
post #4 of 7 Old 12-22-2011, 11:21 PM
Compression Ignition Addict
 
Join Date: Mar 2011
Location: Houston, Tx
Posts: 1,764
Mentioned: 0 Post(s)
Tagged: 2 Thread(s)
Quoted: 34 Post(s)
Thanks: 4
Thanked 60 Times in 60 Posts
Feedback Score: 0 reviews
How did he determine there is no boost is the next question to be answered?
White95f250 is offline  
post #5 of 7 Old 12-23-2011, 06:30 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Oct 2011
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
my buddies mechanic determine that it was a building propet boost from a test drive. Somewhere around 2500 rp m's he was only making about 4 to 5 pounds of boost. I'm sorry for any miss leading information as I'm not very familiar with my buddies engine in the 95. something does have to be wrong though because even with the stock trailer full of horses he barely makes over 12 pounds of boost

Sent from my SPH-M820-BST using AutoGuide.Com Free
Strokeitbig is offline  
post #6 of 7 Old 12-23-2011, 07:27 AM
Powerstroke Techie

 
justinmix's Avatar
 
Join Date: May 2011
Location: Frederick MD.
Posts: 1,975
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 10 Times in 10 Posts
Feedback Score: 0 reviews
He needs to check the MAP sensor, MAP sensor hose, fuel pressure, EBP readings, and check for exhaust leaks. Leaking turbo up pipes will cause low boost. You also need to check peak boost readings under full load, like when pulling a hill. You should be seeing somewhere around 15-17 psi though.
justinmix is offline  
post #7 of 7 Old 12-27-2011, 12:50 PM
Banned
 
Join Date: Sep 2008
Location: Fort Bragg, NC/Buff, NY/Midlothian, VA
Posts: 5,630
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
12psi sounds pretty normal to me for a stock 7.3.

the mechanic, on the other hand, doesn't know dingle berries from the balls of **** on his ***.
85_305 is offline  
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