would bad ficm cause rough running after it warms up - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 4 Old 07-07-2011, 06:48 PM Thread Starter
Member
 
Join Date: May 2011
Location: Mobile AL
Posts: 42
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
would bad ficm cause rough running after it warms up

Just wondering i have been diagnosed with bad ficm on 2007 f350 would that also cause it to run bad aafter it warms up runs with a miss and flutter loss of power

thanks

BAMAFAN

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Bamafan is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 07-07-2011, 06:59 PM
Compression Ignition Addict
 
Join Date: Mar 2011
Location: wichita ks
Posts: 971
Thanks: 0
Thanked 7 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
The usual case for a bad FICM is that the output fall below 48 volts DC when cranking or running or both. Inside the FICM is a DC to DC converter that changes your battery volts from 12 to 48 to drive the hydraulic spool valves on top of the injectors. So what has effectively been done is to mount a precision piece of electronic equipment on top of a diesel engine so it can get all kinds of thermal cycling and get the dog crap shaken out of it. The main reason for this is to keep the wires to the injectors short so there is less voltage drop and other factors that have to do with timing and harmonic generation.
Now on to the meat of the subject if the Capacitors in the FICM are flaking out I could see “maybe” less performance when it is hot. The usual failure mode is that the solder joints that are made with lead free solder ( thanks to the EU ) crack and your performance suffers until the thing warms up and the joints expand back together and then you get full voltage. Without knowing the FICM output voltages when cranking and running hot and cold it is very hard to say what your problem is. Your problem also sounds like a dirty EGR valve. What mods have been done to this truck? Any tuning? What is the repair history?

CHECK OUT THESE LINKS

FICM repair/upgrade

Fix UR FICM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Last edited by HAM_RADIO_MAN; 07-07-2011 at 07:03 PM.
HAM_RADIO_MAN is offline  
post #3 of 4 Old 07-07-2011, 07:24 PM
information regurgitator

 
NYC F-350's Avatar
 
Join Date: Dec 2010
Location: Epping, NH
Posts: 6,350
Thanks: 37
Thanked 270 Times in 246 Posts
Mentioned: 15 Post(s)
Quoted: 49 Post(s)
Feedback Score: 0 reviews
You forgot a link.....
The EGR valve cleaning link


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Please
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

You could save the life of a sick child
NYC F-350 is offline  
post #4 of 4 Old 07-07-2011, 08:22 PM
Compression Ignition Addict
 
Join Date: Mar 2011
Location: wichita ks
Posts: 971
Thanks: 0
Thanked 7 Times in 4 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Thanks NYC-F350 You Da Man !!!
HAM_RADIO_MAN 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