CEL, intermittent misfire, no code. Where to begin? - 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 06-29-2012, 03:37 PM
309 309 is offline
Powerstroke.org Rookie
 

Join Date: Sep 2008
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
CEL, intermittent misfire, no code. Where to begin?

So I've got a 1999 7.3 air duct cleaning truck. Works great.

This morning I got what felt like a misfire under light acceleration along with the service engine soon light coming on. Ran it on the job (running pto at 1382 rpm) all day. Sounded fine, light stayed on. Driving away from job misfire seemed less pronounced but light stayed. Went to Napa to use code reader, no code. I've been conditioned to think running issues with no code = bad cps, so I swapped in a new one. No difference.

A couple of trips around the block since changing out the cps has shown that the light is still on, but the misfire is so slight that I feel I may be imagining it.

I'm at a loss for what to even look at now. This truck is my livelihood, so proper running is essential.

Ideas?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 06-29-2012, 03:51 PM
Compression Ignition Addict
 

Join Date: Dec 2007
Posts: 4,873
Thanks: 1
Thanked 87 Times in 82 Posts
Feedback Score: 3 reviews
The thing is... The equipment NAPA has is just not up to the task. Those generic OBD-II readers are of little use on our trucks because they are Not, strictly, OBD-II (despite the connector )

If your light came ON, there ARE codes, you just need more a sophisticated tool to retrieve it. And that will give you the most accurate direction into finding out what the computer saw as out-of-spec when it happened...

An Independent diesel shop, Ford dealership, of someone with an AutoEnginuity is what you're looking for.
Reply With Quote Quick reply to this message
  #3  
Old 06-29-2012, 04:11 PM
309 309 is offline
Powerstroke.org Rookie
 

Join Date: Sep 2008
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by NoRalPh View Post
The thing is... The equipment NAPA has is just not up to the task. Those generic OBD-II readers are of little use on our trucks because they are Not, strictly, OBD-II (despite the connector )

That's a good bit of info. I'll start with finding a proper code reader. Thanks for providing direction.
Reply With Quote Quick reply to this message
  #4  
Old 06-29-2012, 05:02 PM
aussie=effie
 

Join Date: Apr 2010
Location: melbourne, australia
Posts: 257
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
Wink CEL LITE

You might try disconnecting batteries for a few hours which I believe will clear memory in computer, used to work for my Chev K2500 6.5 anyway /
Reply With Quote Quick reply to this message
  #5  
Old 07-10-2012, 12:19 PM
Powerstroke.org Rookie
 

Join Date: Jul 2012
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
i have a 2001 7.3 with a wide variety of codes, it misses while driving (intermittent),also stalls turning corner sometimes,here are the codes i got from a mech.
P1211,P1217,P1280,P1283,P1284 . i dont know where to start ,these are all injector,pressures, circuits. 215k miles. always been reliable .
Any help would be appreciated.
Reply With Quote Quick reply to this message
  #6  
Old 07-11-2012, 06:23 AM
309 309 is offline
Powerstroke.org Rookie
 

Join Date: Sep 2008
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Mine turned out to have Idm and injector codes. Turned out to be the uvcwh on one side.

Working great now.
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 09:33 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