Engine is running rough - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-08-2011, 12:09 PM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thumbs down Engine is running rough

I bought my first powerstroke diesel(95 f250) about two years ago and haven't had any problems with it till now. I keep up on all the preventative maintenance that diesels are supposed to have, but now something happened and i have no idea where to start. every now and then the truck will start shaking and running very rough(seems like it is misfiring)and the check engine light will come on. it will run like this for a minute or two then stops and run perfectly fine and the CEL will turn off. the other day it started running like that again only it never went back to running like it should. i gave it a little bit of throttle and tried driving it around the block a few times but still nothing changed. not too sure what it could be. any suggestions on where to start or what it could be would be appreciated.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-08-2011, 12:17 PM
Compression Ignition Addict
 

Join Date: Feb 2011
Location: upstate ny
Posts: 2,254
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 7 reviews
Check the UVCH connections (undervalvecoverharness). They tend to come out, causing what you are describing. Pull the valvecovers, and make sure they are properly plugged in. Then, do a search for valve cover quarter trick, to make a wedge to prevent it in the future. If the harnesses have been arcing out for a while they may need to be replaced.
Reply With Quote Quick reply to this message
  #3  
Old 12-08-2011, 12:20 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,707
Thanks: 0
Thanked 34 Times in 34 Posts
Feedback Score: 0 reviews
Knowing what codes are strored would help, but there are a few things you can check:

Check all the wiring connections (there are 4 of them total) at the valvecver gakets (on top) for evidence of melting/burning.

Remove the oil cap and take a sniff. Smell like burned wiring insulation? If so, you may have burned/melted injector wiring harness connections under the valvecovers.

If you feel like it, remove the Injector Driver Modeule (IDM ... the box below the driver's side hood hinge) and see if there is water sloshing around in it.

If all seems good in those departments, post back and we'll look at some other stuff. Cheers!
Reply With Quote Quick reply to this message
  #4  
Old 12-08-2011, 12:21 PM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Ok I will check that out and let ya know how it worked. Thank you.
Reply With Quote Quick reply to this message
  #5  
Old 12-12-2011, 07:34 PM
Member
 

Join Date: Nov 2008
Location: Livermore, CA
Posts: 30
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to freakyjlh
Did you get anywhere with your diagnosis? I'm in the same boat and it is getting frustrating!!!
Reply With Quote Quick reply to this message
  #6  
Old 12-12-2011, 09:11 PM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Yes I did. I pulled off both valve covers and underneith the passenger side I found the wire harness was melted causing the wires to ground. Haven't fixed it yet but am 99.9% that is causing the problem. Thanks for the help guys
Reply With Quote Quick reply to this message
  #7  
Old 12-13-2011, 10:08 AM
Member
 

Join Date: Nov 2008
Location: Livermore, CA
Posts: 30
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to freakyjlh
Well, I pony'ed up the cash and ordered my new UVCH's last night. I'm sure that at least on the passenger side they aren't looking so hot since one plug was covered in oil when I pulled it. Then to make matters worse, I broke the retaining clip on a plug from the drivers side. Go figure. I'm gonna try to pull the covers tonight just to get a peak. I will let you know if I get my issue fixed with the new harnesses. Thanks.
Reply With Quote Quick reply to this message
  #8  
Old 12-13-2011, 10:27 AM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
No problem. Let me know how everything works out for Ya
Reply With Quote Quick reply to this message
  #9  
Old 12-13-2011, 11:54 AM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,707
Thanks: 0
Thanked 34 Times in 34 Posts
Feedback Score: 0 reviews
Replace the valvecover gasket on the affected side(s) or you will be doing it again shortly! You can also get the International external harness repair kit to fix the broken connector shell:

Valve Cover External Harness Repair Kits (contains 4 hard shells w/seals, w/o pins)
(Ford) F7TZ-14489-BA (94-96) w/o pins
(Ford) F7TZ-14489-AA (97) w/o pins
(International) 1830829C91 w/o pins

Cheers!
Reply With Quote Quick reply to this message
  #10  
Old 12-13-2011, 05:26 PM
Member
 

Join Date: Nov 2008
Location: Livermore, CA
Posts: 30
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via Yahoo to freakyjlh
I went with the whole pin/harness kit. Looks like it comes with everything.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Tags
1995, cel, misfire, shaking

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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
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 02:50 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors