Hesitation thru driving range. - 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 09-17-2013, 06:37 PM
Powerstroke.org Fanatic
 

Join Date: Aug 2011
Location: Carlsbad, nm
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Hesitation thru driving range.

I am in the middle of my work week so I have not looked at the truck yet, but would love to get some points as to where to start looking.

I installed my PHP Pheonix a few weeks ago and it's been running great. A few days ago I changed the fuel filter and I started to get random a "bucking" as if the fuel is instantly being shut off. It only last long enough to buck the truck but then keeps running.

Tonight, the bucking was pretty bad on my drive home for the first 15 miles and then got better.

There are no codes stored and it happens at all rpm ranges?

Any directions I should start looking? Maybe fuel relay going bad?

Thanks ahead of time for any replies
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 09-18-2013, 10:43 AM
Powerstroke Junkie


 

Join Date: Aug 2006
Location: Mayberry, NC
Posts: 8,309
Thanks: 0
Thanked 41 Times in 9 Posts
Feedback Score: 0 reviews
My best guess would be you may have knocked one of the UVC harness connections loose on the inside of one of the valve covers. Check these connections and make sure they are good n tight with no loose or burnt conditions. Make sure the drain for the FF bowl is fully closed. If the problem is still there, pull the chip and see if this changes anything.
What are you using to scan codes? Are you sure it has the right software bundle to read our trucks since they are not OBD II compliant? Can you do any live data logging with it?

Please fill out your signature in the USER CP area and let us know what we are working on along with what you have done to it.
Reply With Quote Quick reply to this message
  #3  
Old 09-18-2013, 05:14 PM
Powerstroke.org Fanatic
 

Join Date: Aug 2011
Location: Carlsbad, nm
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by NCHornet View Post
My best guess would be you may have knocked one of the UVC harness connections loose on the inside of one of the valve covers. Check these connections and make sure they are good n tight with no loose or burnt conditions. Make sure the drain for the FF bowl is fully closed. If the problem is still there, pull the chip and see if this changes anything.
What are you using to scan codes? Are you sure it has the right software bundle to read our trucks since they are not OBD II compliant? Can you do any live data logging with it?

Please fill out your signature in the USER CP area and let us know what we are working on along with what you have done to it.
The Connection is one of my guesses also, but the difference between the first 15 miles and the remainder of the drive is making me think it might be an temp issue. Like the pressure requirement differences for the ICP between a hot and cold engine.

I did think of pulling the chip also, just have not done it yet.
I might have gotten a faulty CPS from Oreillys also.
The ideas keep coming, and love the input.

I just used a soft code scanner with no luck of course. I am in the middle of the work week and don't have the time until Friday but I have a friend with a diesel shop and will get the hard codes this weekend. I was surprised to find the parts store don't have the proper scanner for our truck seeing that we are in the middle of oil country with a lot of diesels.

I'll keep posted to what I find wrong, and would liove to hear other possible options also.
I'll be spending some time under the hood this weekend.
Reply With Quote Quick reply to this message
  #4  
Old 09-18-2013, 05:18 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Chico, California
Posts: 3,583
Thanks: 17
Thanked 108 Times in 103 Posts
Feedback Score: 0 reviews
The BW cps from oreilys has been known to cause those symptoms while running the windshield wipers.
i installed one on my truck last week and ran the wipers and it was fine.

so i would swap out to a different cps and see.
Reply With Quote Quick reply to this message
  #5  
Old 09-19-2013, 03:20 AM
Powerstroke.org Fanatic
 

Join Date: Aug 2011
Location: Carlsbad, nm
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by blue99stroker View Post
The BW cps from oreilys has been known to cause those symptoms while running the windshield wipers.
i installed one on my truck last week and ran the wipers and it was fine.

so i would swap out to a different cps and see.
Yup, That is the CPS I bought. I think there is a 1 year warantee on them with oreillys, so I'll see on Friday.

With my '95 PSD, there was a spacer/shim between the block and the CPS. There is not one on this truck. Should there be?

I just cleaned the connection for the PHP chip again and I'll see if that was the issue when I drive it this morning. If the bucking happens again, I'll pull the chip and see if the issue goes away.

If not, the CPS is the next item up for business. If not that, then time to start digging into the motor on Friday
Reply With Quote Quick reply to this message
  #6  
Old 09-19-2013, 01:16 PM
Powerstroke.org Fanatic
 

Join Date: Aug 2011
Location: Carlsbad, nm
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
This morning, I did this:
Cleaned the connections for the PHP chip and re-installed
Still bucking
Removed the chip, still bucking and no change
re-installed chip and decided to look under the hood at the ICP
ICP plug was soaked in oil
Reply With Quote Quick reply to this message
  #7  
Old 09-19-2013, 06:53 PM
Powerstroke.org Fanatic
 

Join Date: Aug 2011
Location: Carlsbad, nm
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Tonight, I unplugged the ICP and ran the truck. Still bucking.
Just giving an update and hoping for any input.
I'm leaning towards a faulty new CPS.
I'll put it on a computer tomorrow and we'll got from there.
Reply With Quote Quick reply to this message
  #8  
Old 09-20-2013, 08:41 AM
Powerstroke.org Fanatic
 

Join Date: Aug 2011
Location: Carlsbad, nm
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
The verdict is in!
Oreillys CPS was bad. Went to Ford and got 2 OEM CPS's
Oreillys CPS was $31, Fords was $27.
After the CPS change, took the truck to my buddies shop and had the codes read/deleted and he did a system check with his Snap On.
I'll be ordering a ICP today and get it on the way, that sensor was reading good but a little low on the scanner, but I know that oil is bypassing and it needs to be changed before the road trip.
The girl now has a clean bill of health and ready to tow my toys.

Thanks for all the help guys!
Reply With Quote Quick reply to this message
  #9  
Old 09-20-2013, 11:50 AM
Powerstroke Junkie


 

Join Date: Aug 2006
Location: Mayberry, NC
Posts: 8,309
Thanks: 0
Thanked 41 Times in 9 Posts
Feedback Score: 0 reviews
Glad you got her to stop bucking, now get another CPS (FROM FORD) and carry it with you along with the tools to change it.
Reply With Quote Quick reply to this message
  #10  
Old 09-20-2013, 12:05 PM
Powerstroke.org Fanatic
 

Join Date: Aug 2011
Location: Carlsbad, nm
Posts: 140
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by NCHornet View Post
Glad you got her to stop bucking, now get another CPS (FROM FORD) and carry it with you along with the tools to change it.
LOL

One step ahead of ya. Since I was there, I bought 2.

My '95 went thru a couple of them and i don't see any design change between the 2 trucks.

Now i'm just trying to convince my wife that the new PHP chip is not what made the CPS go bad.
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:
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 03:39 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