Loss of power when towing ('01 7.3 powerstroke) - 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 01-03-2012, 09:58 AM
Powerstroke.org Rookie
 

Join Date: Oct 2007
Location: Navajo, NM
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Loss of power when towing ('01 7.3 powerstroke)

I'm having power loss problems when towing. I own a 2001 7.3 F250 Powerstroke. When hauling a 2-horse trailer, going uphill I loss power. I pushed down on the pedal to try and excelerate, but the truck down shift and would not gain any power and was blowing smoke. Once I topped the hill, there was no problem excelerating. In another instance, I was excelerating onto the freeway and punched my pedal and the truck got stuck in a down shift and would not go any faster, until I let go of the pedal and slowly excelerated to a higher speed. Does anyone know what my truck problem might be???? HELP!!!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 01-03-2012, 10:43 AM
Banned

 

Join Date: Aug 2010
Location: reppin da 615
Posts: 1,919
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
sounds like either a boost or exhaust leak. air filter might be creating a restriction as well
Reply With Quote Quick reply to this message
  #3  
Old 01-03-2012, 11:15 AM
Powerstroke.org Fanatic
 

Join Date: Jan 2009
Location: Colonial Beach VA
Posts: 113
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Mine does the same crap. It runs strong but, if I lay into it on an off ramp it will hold at @ 3300 untill I let off it then it will shift and I can lay back into it and it moves on out...Its like its maxed out in that gear but wont shift to the next one..It WILL NOT upshift untill I let off the throttle just a tad.. I have 2 buddies with the same exact problem..Boost is not the problem as buy the gauge it makes plenty...as for the uphill thinng It happend to me ones as well when I first got it...now I have to "anticipate" the hill...anybody on here who has ever driven a "318" detroit will know just what I mean
Reply With Quote Quick reply to this message
  #4  
Old 01-03-2012, 03:57 PM
Compression Ignition Addict
 

Join Date: Jul 2010
Location: Falls Chruch
Posts: 463
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I had the exact same issue.

This is most likely a fuel pressure problem if you are confident of boost. You need to check for a boost leak first as well as leaky up pipes. If all is well thre, install a fuel pressure gauge.

I would guess it's a faulty fpr, but you need to rule out the fuel pump and clogged pickup. Get a gauge on there and check while towing. Fpr rebuild from diesel orings was $60 and fixed my issues.

Let me know if you need troubleshooting methods.
Reply With Quote Quick reply to this message
  #5  
Old 01-03-2012, 05:09 PM
Powerstroke.org Fanatic
 

Join Date: Jan 2009
Location: Colonial Beach VA
Posts: 113
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by audiocontr View Post
I had the exact same issue.

This is most likely a fuel pressure problem if you are confident of boost. You need to check for a boost leak first as well as leaky up pipes. If all is well thre, install a fuel pressure gauge.

I would guess it's a faulty fpr, but you need to rule out the fuel pump and clogged pickup. Get a gauge on there and check while towing. Fpr rebuild from diesel orings was $60 and fixed my issues.

Let me know if you need troubleshooting methods.
I just noticed the other night my drivers up pipe is full of soot as is the firewall...but it runs it tail off on the highway... I will def be fixing the up pipe next as thats an obvious problem.
Reply With Quote Quick reply to this message
  #6  
Old 01-03-2012, 05:10 PM
Premium Member
 

Join Date: Jul 2011
Location: Monroe, Georgia
Posts: 3,643
Thanks: 1
Thanked 15 Times in 14 Posts
Feedback Score: 1 reviews
Quote:
Originally Posted by audiocontr View Post
I had the exact same issue.

This is most likely a fuel pressure problem if you are confident of boost. You need to check for a boost leak first as well as leaky up pipes. If all is well thre, install a fuel pressure gauge.

I would guess it's a faulty fpr, but you need to rule out the fuel pump and clogged pickup. Get a gauge on there and check while towing. Fpr rebuild from diesel orings was $60 and fixed my issues.

Let me know if you need troubleshooting methods.
Sorry to hijack.....really I am.

Trouble shooting methods would be great. I have limited 7.3 experience. I currently have hold of an 02 F450 with this same but intermittant issue.

I first saw the truck with a half dozen codes in it starting with a system voltage code. One battery was dead and the other was marginal at best. Replaced both batteries and test drove. Truck was fine.

A month later here I am. This thread is his complaint. I picked truck up and drove it in 20 miles to shop. It ran smooth but felt under powered. Pulled codes, had an ICP above/below desired code and a KAM code. I assumed the KAM was from the battery replacement but thought it should have been gone by now. I ran a contribution test and got a cyl 3 fault. Ran a buzz test and got no codes. Both KOEO and KOER tests are good without codes. I will admit to going home at this point to pick up the trail tomorrow. I thought I heard a boost leak during the KOER test but have not looked for it yet. I was thinking fuel pressure and/or fuel volume because of the fuel pump making a fairly nasty gargling sound from under the truck while fiddling around with the scanner. It has not reset any codes since I cleared them.

Am I on the right track and as there any magic advice?

Sorry again for the lengthy hijack and thank you.
Reply With Quote Quick reply to this message
  #7  
Old 01-03-2012, 05:41 PM
Powerstroke.org Fanatic
 

Join Date: Jan 2009
Location: Colonial Beach VA
Posts: 113
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I have a feeling I have other problems too...Like an HPOP or bad injector...after the truck sits overnight the morning l go to start it reguardless of temp I have to watch the oil gauge...if it does not come up with in a few seconds I have to feather the throttle otherwise the truck will die. Then its a crank fest after which when it finally comes to life it misses and runs like crap for 10 miles or so....I have alread burned up 2 starters in 3 years When mine runs on the highway tho it will pull a house over from 30 to 90mph...power really does not seem to be a big issue, its that not shifting is what puzzles me. (along with my starting issue) I can hold it to the floor and it maxes out..then when I let up off it for a split second it up shfts and l step back on it it will flat out get it.

Last edited by drummondracing; 01-03-2012 at 05:49 PM.
Reply With Quote Quick reply to this message
  #8  
Old 01-03-2012, 05:51 PM
Powerstroke.org Fanatic
 

Join Date: Jan 2009
Location: Colonial Beach VA
Posts: 113
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by audiocontr View Post
I had the exact same issue.

This is most likely a fuel pressure problem if you are confident of boost. You need to check for a boost leak first as well as leaky up pipes. If all is well thre, install a fuel pressure gauge.

I would guess it's a faulty fpr, but you need to rule out the fuel pump and clogged pickup. Get a gauge on there and check while towing. Fpr rebuild from diesel orings was $60 and fixed my issues.

Let me know if you need troubleshooting methods.
YOU in Falls Church VA?
Reply With Quote Quick reply to this message
  #9  
Old 01-04-2012, 06:17 AM
Compression Ignition Addict
 

Join Date: Jul 2010
Location: Falls Chruch
Posts: 463
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by drummondracing View Post
YOU in Falls Church VA?
Thats correct.
Reply With Quote Quick reply to this message
  #10  
Old 01-04-2012, 06:27 AM
Compression Ignition Addict
 

Join Date: Jul 2010
Location: Falls Chruch
Posts: 463
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by sargar View Post
Sorry to hijack.....really I am.

Trouble shooting methods would be great. I have limited 7.3 experience. I currently have hold of an 02 F450 with this same but intermittant issue.

I first saw the truck with a half dozen codes in it starting with a system voltage code. One battery was dead and the other was marginal at best. Replaced both batteries and test drove. Truck was fine.

A month later here I am. This thread is his complaint. I picked truck up and drove it in 20 miles to shop. It ran smooth but felt under powered. Pulled codes, had an ICP above/below desired code and a KAM code. I assumed the KAM was from the battery replacement but thought it should have been gone by now. I ran a contribution test and got a cyl 3 fault. Ran a buzz test and got no codes. Both KOEO and KOER tests are good without codes. I will admit to going home at this point to pick up the trail tomorrow. I thought I heard a boost leak during the KOER test but have not looked for it yet. I was thinking fuel pressure and/or fuel volume because of the fuel pump making a fairly nasty gargling sound from under the truck while fiddling around with the scanner. It has not reset any codes since I cleared them.

Am I on the right track and as there any magic advice?

Sorry again for the lengthy hijack and thank you.

Sounds like you have a leak in the high pressure system. Any oil in the valley? Could be HPOP or ICP. you must track it down and fix it. I was able to find a ford bulletin recently that had the procedure and its not that difficult. Its an O-ring fix usually.

Ignore the KAM code. I'm also inclined to ignore the cyl 3 fault as 3 and 8 seem to have issues with the new CPS.

You need to check for codes (which you have). Follow the code and fix issue
You need to check for boost leaks using a leak detector (search for DIY). You need to check for up pipe leaks (search and read up)
You need to check fuel pressure (expensive but absolutely required.)

If all of those troubleshoot within spec, its a bigger deal somewhere else
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 12:02 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