96 No Start-Rough Run Strange? Problem - 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 09-05-2011, 03:32 PM
Powerstroke.org Rookie
 

Join Date: Jul 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
96 No Start-Rough Run Strange? Problem

Vehicle: 1996 F250 manual trans., no eng. mods., owned since new, 125k miles.

Truck started running rough, 'cutting out', stalling then start right up. I was close to home and 'limped' back & parked it. When I tried to start again it just cranked no start at all.
I hooked up a generic OBD-II scan tool and it started but ran rough. I quickly figured out that a generic OBD-II tool is worthless for diagnosing a 1996 Powerstroke. I bought an Auto Enginuity Scan Tool with Ford software.

If you just try to start it after the glow plug light goes out, it just cranks, no start.
However, if you then plug in the OBD-II cable and start the software, it starts right up.
Something is set or reset by this action.
I've tried this six times with the same results.
Is it a badt PCM or ?

When it does start it cuts out like injectors not opening.
Using the data monitoring and tests I've found that:

KOER test: P1283 error sometimes also returns 'System Pass' when oil up to temp. sometimes.
The ICP and IPR % & V are OK at idle and increase with RPM. I tested the IPR and wiring per the troubleshooting guide and the coil, wiring to fuse and PCM continuity & voltages were also OK.

I checked the oil level at the front of the engine and it was right below the plug.

I replaced the cam position sensor. I didn't think that was it because the tach was going up to 200 RPM when cranked. It wasn't the cam sensor.

Other things noted when monitoring:
System voltage was 12.2 VDC with glow plugs on, went up to 14.4-14.6 VDC after glow plugs turned off - seems high.

"Engine Coolant Temperature Input" is pegged at 302 degrees until oil gets up to 148 degrees then it changes to 5 degrees and starts climbing. Don't know if this is a real sensor or derived. The temp. on the dash behaves normally.

Any ideas on what to replace, monitor or test to fix this?
Thanks
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 09-05-2011, 03:48 PM
Compression Ignition Addict
 

Join Date: Jan 2007
Location: Santa Rosa, CA
Posts: 2,026
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
i have a 96er myself. had similar problems years ago.

ICP sensor will only cause a rough idle, no stalling.
Bad IDM (injector driver module) would cause your problems
Bad Injector harnesses would cause this
Bad High Pressure Oil Pump (HPOP)

just a few ideas to check out.........
Reply With Quote Quick reply to this message
  #3  
Old 09-06-2011, 07:37 AM
Powerstroke.org Rookie
 

Join Date: Jul 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I realize those things could cause the rough running, but not the first problem I need to fix. I just tried it again and its real.

If I just try to start it, it cranks but does not start.

If I plug in the notebook computer and connect using the Auto Enginuity software it starts right up.

What could cause this? Seems like something gets set or reset.
Reply With Quote Quick reply to this message
  #4  
Old 09-06-2011, 04:34 PM
Powerstroke.org Rookie
 

Join Date: Jul 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
What is a 'normal' range for ICP pressure reading at idle?
Reply With Quote Quick reply to this message
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:
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 06:01 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