Intermittent Boost Problem - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 1 Old 07-02-2013, 02:23 PM Thread Starter Rookie
Join Date: Nov 2011
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Intermittent Boost Problem

I have already solved this problem, but I wanted to post in case anyone else ever runs into the issue.

I was having an intermittent and extreme loss of boost. For example, for half of a 30 minute drive the truck would be fine. For the second half of the trip I could not build more than 2 psi of pressure. If I stopped, turned the truck off, back on, and continued on my way... it might be back to normal or it would continue to lack boost, 50-50 chance. Seemingly random.

Solution: I had developed a loud exhaust rattle many months back before the boost problem cropped up. I thought nothing of it, wasn't concerned, and was in no hurry to fix it. I never would have thought the two problems were related. It turns out that the catalyst in the catalytic converter had broken loose inside. It was bouncing around freely and about half the time it would become lodged on the output side of the catalytic converter housing. This created such a restriction in the exhaust path that there was hardly any flow. No air out equals no air in. One symptom was that the turbo sounded as if there were a leak on the charged air side. I had a shop do a diagnostic with their IDS. Everything checked out fine at the time. Installing a catalytic converter delete kit or, as I did, removing the catalyst and reinstalling the stock pipe solved the problem. I also suspect the Exhaust Back-pressure (EBP) sensor may have indicated a restriction.
jpd_f550 is offline  
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:


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