Rough cold start and 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 06-19-2009, 12:41 PM
Member
 

Join Date: Jun 2009
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Rough cold start and idle

Im sure this has been posted a million times here but im posting this at work and did not have much time to read through the posts... here goes

I just recently baught a 99 7.3, On cold startups the Engine shakes and knocks pretty bad. After 20-30 seconds the shakes and knocks go away. When i go to drive the truck it is very sluggish and has no power, after about 3 or 4 mins of going down the road the truck "fixes itself" and drives much better. Although you can still notice a power loss and hesitation. Ive noticed you can let the truck sit running as long as you want for it to warm and it still has the sluggish/no power problem. It is only when you get it down the road a bit that the problem gets better.

***Note*** during all this the truck DOES NOT smoke black, white, or anything.

The truck has new batteries, alternator, cps, and the fluids look fine.
Where should i start in trying to fix this problem? thanks
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 06-19-2009, 05:04 PM
Member
 

Join Date: Jun 2009
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
^^^^^^^^^^^^^^^^^^^^^^^

Last edited by Maxont; 06-19-2009 at 10:31 PM.
Reply With Quote Quick reply to this message
  #3  
Old 06-19-2009, 05:15 PM
Compression Ignition Addict
 

Join Date: Jul 2007
Posts: 5,426
Thanks: 1
Thanked 8 Times in 8 Posts
Feedback Score: 0 reviews
EBPV valve? Or glow plug issue?
Reply With Quote Quick reply to this message
  #4  
Old 06-19-2009, 05:36 PM
Member
 

Join Date: Jun 2009
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
the ebpv should throw a code shouldnt it? im not sure on the symtoms of bad glow plugs... the truck has never really been in temps below 30-40deg and normal starting temp this truck saw was probably 50's... with that being said do you think the glow plugs could really be the problem?... im just not sure on what kind of abuse makes them go bad or even just over time.
Reply With Quote Quick reply to this message
  #5  
Old 06-19-2009, 06:16 PM
jcs jcs is offline
Premium Member
 

Join Date: Apr 2007
Location: groton,Ma
Posts: 200
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
How is your fuel filter? how many miles do you have on your oil? I wouldnt think it would be a gp problem in warm temps but you should check the gp relay
Reply With Quote Quick reply to this message
  #6  
Old 06-19-2009, 09:10 PM
Member
 

Join Date: Jun 2009
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
fuel filter looks fine the can was clean too. oil might be getting a little old but is still fine. how do i check the gp relay? i think if the plugs are bad drawing less than 20 amps or something they throw a code?.. just what i've heard from friends

Today when i checked the fuel filter i left the cap off and removed the filter so i could see the fuel inlet. i turned the key on to see what kind of pressure i had, the fuel came through the inlet almost like a garden hose would when turned on. i know the fuel pressure should be at 45-65psi? but i dont exactly know what that looks like nor do i have a pressure tester. any ideas on what the pressure should look like coming into the can?

Last edited by Maxont; 06-19-2009 at 10:45 PM.
Reply With Quote Quick reply to this message
  #7  
Old 06-19-2009, 10:14 PM
Member
 

Join Date: Jun 2009
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
GPR is fine, just meter checked it along with the glow plugs which all ohm at .8
Reply With Quote Quick reply to this message
  #8  
Old 06-19-2009, 11:03 PM
Compression Ignition Addict
 

Join Date: Jul 2007
Location: Henderson
Posts: 156
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Quote:
Originally Posted by Maxont View Post
Im sure this has been posted a million times here but im posting this at work and did not have much time to read through the posts... here goes

I just recently baught a 99 7.3, On cold startups the Engine shakes and knocks pretty bad. After 20-30 seconds the shakes and knocks go away. When i go to drive the truck it is very sluggish and has no power, after about 3 or 4 mins of going down the road the truck "fixes itself" and drives much better. Although you can still notice a power loss and hesitation. Ive noticed you can let the truck sit running as long as you want for it to warm and it still has the sluggish/no power problem. It is only when you get it down the road a bit that the problem gets better.

***Note*** during all this the truck DOES NOT smoke black, white, or anything.

The truck has new batteries, alternator, cps, and the fluids look fine.
Where should i start in trying to fix this problem? thanks
Based on my symptom chart for a 2003 7.3L you should be checking your engine oil level, check for oil in coolant, when was it changed last, and is it the right oil for your truck (SAE oil viscosity and API rating). Check for aerated oil. Check MAP Sensor for holes, blockage, or disconnection. Check air intake system: after filter minder. Check intake manifold system for leaks. Check for sufficient clean fuel. Check for intake restriction.

A few more things that you should test are the CMP, ICP, and IPR.

I would also do a visual and follow your fuel supply line back to the tank and look for additional inline filters or mods that may have gone bad.
Reply With Quote Quick reply to this message
  #9  
Old 06-20-2009, 03:14 PM
Member
 

Join Date: Jun 2009
Posts: 36
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
i put my buddies superchip programmer/scanner on the truck and changed it to tow safe. now when the truck starts a puff of white smoke comes out. truck doesnt shake as much and also runs better...but still has a hard time starting. any ideas on this?
Reply With Quote Quick reply to this message
  #10  
Old 06-20-2009, 03:56 PM
Compression Ignition Addict
 

Join Date: Jul 2007
Location: Henderson
Posts: 156
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Quote:
Originally Posted by Maxont View Post
i put my buddies superchip programmer/scanner on the truck and changed it to tow safe. now when the truck starts a puff of white smoke comes out. truck doesnt shake as much and also runs better...but still has a hard time starting. any ideas on this?
Without any DTC's to reference its just a process of elimination. There are some really good posts in the Tech section of this forum, I would recommend browsing them and then decide your next move. I think you will find them very helpful.
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 11:46 PM.


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