High idle to low idle - 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 05-04-2013, 11:12 PM
Compression Ignition Addict
 

Join Date: Jan 2011
Posts: 579
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
High idle to low idle

So when my truck is sitting in park the truck will idle normal. Normal obs lope then to a little rougher lope. Only like a 75-125rpm drop. Nothing dramatic. But the further back you stand the difference is more noticeable. What could this be? Kinda annoying when just sitting... at an idle in park. Does it more at proper temp. But still will do it cold if sits long enough. Any idea what would cause this? Is it something I should be concerned about? Both my OBS do it. You can hear the motor start whirling right before it changes idle. Could this be a cps issue? Throttle position sensor? Or is it more mechanical then that?

Sent from AutoGuide.com Free App

Last edited by Jerzyperson; 05-05-2013 at 09:04 AM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 05-05-2013, 09:04 AM
Compression Ignition Addict
 

Join Date: Jan 2011
Posts: 579
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Bump

Sent from AutoGuide.com Free App
Reply With Quote Quick reply to this message
  #3  
Old 05-05-2013, 09:40 AM
Compression Ignition Addict
 

Join Date: Apr 2012
Location: Texas
Posts: 691
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
My RPM at idle has a little flux too. I think I have heard the IDM mod helps smooth out the idle.
Reply With Quote Quick reply to this message
  #4  
Old 05-05-2013, 10:07 AM
Compression Ignition Addict
 

Join Date: Jan 2011
Posts: 579
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I was curious about that.
Reply With Quote Quick reply to this message
  #5  
Old 05-05-2013, 10:14 AM
Compression Ignition Addict
 

Join Date: Feb 2010
Location: Farmersville/Dayton, Ohio
Posts: 3,327
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 1 reviews
I think its in the IPR, or the oil. My truck did it horribly when i put the new engine in, until i changed the oil. It sucked draining all that oil with only 3-4 hours of run time and maybe 50 miles, but it ran waaaay better once i got my good stuff in it.
Reply With Quote Quick reply to this message
  #6  
Old 05-05-2013, 10:32 AM
Compression Ignition Addict
 

Join Date: Jan 2011
Posts: 579
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I just did an oil change not too long ago. Prolly not even a thousand miles. I know it does burn oil but not horribly bad. I just had to add a little bit. Possibly added too much? Not going to lie I didn't notice it after my oil change. But like I said I'm not at the normal 3k change mark...
Reply With Quote Quick reply to this message
  #7  
Old 05-05-2013, 10:48 AM
Compression Ignition Addict
 

Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,043
Thanks: 0
Thanked 12 Times in 12 Posts
Feedback Score: 0 reviews
Could ICP or fuel pressure issues or maybe even CPS. Bet your ICP is oily.
Reply With Quote Quick reply to this message
  #8  
Old 05-05-2013, 11:17 AM
Compression Ignition Addict
 

Join Date: Jan 2011
Posts: 579
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I just checked them. Not oily.
Reply With Quote Quick reply to this message
  #9  
Old 05-05-2013, 11:20 AM
Compression Ignition Addict
 

Join Date: Jan 2011
Posts: 579
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Checked the icp. Not oily. And replaced the cps when I bought the truck..
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 06:34 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