Rough Running - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 03-31-2012, 11:45 AM Thread Starter Rookie
Join Date: Mar 2012
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Rough Running

I have a '03 7.3 that runs terrible for the first 15 mins. When the air temp is 25-30 degrees. It's loud and shakes like crazy. After it warms up and even if I use the block heater it only runs slightly better. It doesn't blow smoke. Even when air temp goes above 55-60 it runs just ok, not great. It's had 4 fuel pumps, a turbo pedestal, and a slightly leaky injector replaced but nobody can figure it out. I'm no mechanic but I'm leaning toward an air intake problem.It has a K&N that is only slightly dirty. Is there some kind of air control thing that may be sticking closed or something else ?
New York 7.3 is offline  
post #2 of 2 Old 03-31-2012, 12:47 PM
Compression Ignition Addict
jesilvas's Avatar
Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,148
Thanks: 0
Thanked 27 Times in 25 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
The K&N isn't best for it. Hope the motor isn't dusted.
4 fuel pumps? That seems like parts were thrown at it.
It might be a sticking EBPV, incorrect high pressure oil pressure which could be a bad ICP or IPR valve, bad fuel pickup in the tank, bad FPR on the fuel bowl. Any codes?

2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
330,000 + miles
jesilvas is offline  

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