how do you track down a boost leak? - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 12-15-2008, 11:05 PM
Emergency Services

Join Date: Aug 2008
Location: Austin, Texas
Posts: 491
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to AaronATX
how do you track down a boost leak?

i'm trying to figure out where this weird boost leak is coming from.. i recently did the foil delete so that makes me think it's from putting the i/c pipe back in wrong but i don't know. cruising at 40mph in high gear, in any of the tunes, my truck sits at about, maybe 1100-1200 rpm's and boost generally goes no higher than 8psi before downshifting. i'm noticing this drop in boost, and a whooshing noise from under the hood, but only when i'm at about 1100-1200 rpms and at about 3-4psi of boost and hit a load (like a small incline) and start to give it a little more pedal. with the tunes my truck can sit in those low rpm's and pull itself up the hill with the low end grunt, and it still does but feels a little less responsive and once i start giving it pedal the boost gauge goes to 0. then when my truck downshifts it goes up to whatever psi, you know, 18, 20, 26, etc. and it doesn't lose boost in the HIGHER PSI's, only in the lower ones. what gives?
Reply With Quote Quick reply to this message
Sponsored Links
Old 12-15-2008, 11:30 PM


Join Date: Nov 2006
Location: Trempealeau, WI
Posts: 31,750
Thanks: 132
Thanked 170 Times in 152 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to Dave
Soapy water on the intercooler boots works
Reply With Quote Quick reply to this message
Old 12-16-2008, 03:00 AM
Powerstroke Junkie


Join Date: Aug 2006
Location: Mayberry, NC
Posts: 8,308
Thanks: 0
Thanked 46 Times in 10 Posts
Feedback Score: 0 reviews
The easiest way is to go to the plumbing section, you can buy a rubber boot that will fir over the intake plumbing, on the other end get a threaded cap and hose clamp the boot to the threaded part of the cap. Now drill a holw in the square plug on the end of the cap and screw in the correct compressor fitting, apply some silicone to the threads to help seal it. Now slide the other end of the rubber boot over the intake and tighten with a hose clamp. Now you can apply air pressure ( 25 psi should be fine) and look for boost leaks.
Reply With Quote Quick reply to this message
Sponsored Links

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What state or province do you live in?
Security Question
*Required, this field is not shown to others. Enter the last two characters of the word "Powerstroke"
Security Question #2
*Required, this field is not shown to others. "While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State the animal mentioned in the sentence above."
Please select your insurance company (Optional)


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
Display Modes

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

All times are GMT -8. The time now is 09:00 PM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.