Need Help from Powerstroke Gurus - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 2 Old 07-28-2011, 04:36 PM Thread Starter Rookie
Join Date: Apr 2008
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Need Help from Powerstroke Gurus

I have a challenge for you powerstroke Genius's.
I am hopping to get some help diagnosing my 1997 F350, Powerstroke with manual transmission.
Here is what it is doing:
Rough idle. Rough running up to 2000rpm. loss of power. Bad mpg. Down to 12mpg or less from 16-18. occasional surging while driving under no load.If you try and hold the rpms at 1800 it will stay there for about 5 seconds and then increase to 2200 and steady.
Here is what I have done so far:
Fuel filter is changed every two oil changes.(3-5000 miles)
Pulled all injectors and had them tested and re-sealed. Replaced one injector with re-manufactured. Replaced harnesses under valve cover. Replaced valve cover gaskets. Checked and cleaned all harness connections.(PCM, IDM etc.)
No codes.
I have an AE scan Tool program. Here is what I have tried and or noticed.
Cylinder Contribution. Never lists the same cylinders. Always 3 random. When running this test it always goes through two cycles on all 8 cylinders and then reports. On occasion it will only go through one cycle(of 8) and then show only one cylinder fault. One other note in regards to an above symptom,when holding at 1800 rpm and it spikes to 2200+ the voltage or the pedal position(monitored by scan tool) does not change.
Sorry for the long post just trying to get all the info.
Thanks to anyone who responds.
btracy is offline  
post #2 of 2 Old 08-01-2011, 06:58 PM Thread Starter Rookie
Join Date: Apr 2008
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
An update for anyone who can help. I have removed and cleaned the fpr valve. I have also replaced the idm from another good running powerstroke. Still cannot get a consistant cylinder cont. test. Frustrated!!
btracy is offline  

97 rough idle , poor mpg , rough running

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