Surging Idle at start??? Hot or cold. HELP! - 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 02-11-2013, 03:54 PM
Powerstroke.org Rookie
 

Join Date: Feb 2012
Location: Sunny Buffalo, NY
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Question Surging Idle at start??? Hot or cold. HELP!

I have spent a few hours now looking for a similar situation but no luck. So new post here goes. I have a 96 with 185K on the ticker. Recently it has developed a surging idle when I start it and has become much harder to start when cold. She used to fire right up, but always gave some good smoke for a minute or so. Two weeks ago I started the truck cold and it started surging, about 400-1000 rpm. If I rev it to 1000 rpm or so for a few seconds she drops down to about 500 rpm and comes up to 600 and sits fines. I don't feel any real power loss or big change in fuel consumption. I read in another post that unplugging the ICP while its surging may tell you if your sensor is bad. I fired the truck up and with it surging unplugged the icp. Smoothed right out. Replaced the sensor and still have the same problem. Used a ford part, no aftermarket. The problem happens with the truck cold or warm. The weather does not seem to matter ether. It's been everything from 60 to 0 out in the last few weeks here in Buffalo. Insane weather! There have been a few times it fired right up like it used to and runs fine, but I still get a good amount of smoke. No oil in the valley and the level is fine in the HPOP. I'm stumped! Where should I start?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 02-11-2013, 05:25 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,643
Thanks: 0
Thanked 27 Times in 27 Posts
Feedback Score: 0 reviews
Next time, try starting it in neutral (I'm assuming an automatic here). Does it still do it? If it is smooth in neutral, you might try adjusting (or replacing) your Transmission Range Sensor. Cheers!
Reply With Quote Quick reply to this message
  #3  
Old 02-11-2013, 06:02 PM
Powerstroke.org Rookie
 

Join Date: Feb 2012
Location: Sunny Buffalo, NY
Posts: 12
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Patrick Feeley View Post
Next time, try starting it in neutral (I'm assuming an automatic here). Does it still do it? If it is smooth in neutral, you might try adjusting (or replacing) your Transmission Range Sensor. Cheers!
Case closed! Cranks and runs perfect. I think that my range sensor is bad. I'm not an expert but I think that thing can really cause a slew of problems. I should have changed it a while ago. When I bought the truck last year the PO called the day I was supposed to pick it and said it would not start. I don't think he was very mechanical but told me they had to replace the solenoid on the fender. When I got the truck, I noticed it had not been changed and thought he was a jerking me around. I had some tranny issues (hard shifting, dropping out of gear, O/D light flashing, etc) so I crawled under the truck and saw that the sensor had been changed. I'm assuming to some autozone junk. After cleaning the connector with contact cleaner and adjusting all my tranny issues disappeared. Then I had the truck not crank for me. Put her in neutral and problem solved. Cleaned/adjusted it again and she fired right up. Every time I use/see aftermarket.....problems!!! Go OEM. I'll put up the outcome but I'm sure that's it. Thanks Pat!
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 06:20 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