sick 73 - 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 02-22-2012, 02:02 PM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
sick 73

Truck starts and idles fine runs fine till you need alot of power then the service engine light comes on and runs like crap shaking missing bad. Lit ldle and runs fine till you need power then it falls on its face again new fuel filter new cam sensor full of fuel. codes P0470 and P0478 any help would be great.
Thanks
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 02-22-2012, 02:08 PM
Member
 

Join Date: Jan 2011
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Buddy of mine had an issue similar, it ended up being the HPOP AND he was getting air in the fuel line from a small crack somewhere. Any other known issues? leaks? started out of no where?
Reply With Quote Quick reply to this message
  #3  
Old 02-22-2012, 02:10 PM
Super Moderator

 

Join Date: Jul 2008
Location: Orangevale, CA
Posts: 11,344
Thanks: 9
Thanked 85 Times in 79 Posts
Feedback Score: 0 reviews
Here's what the codes are with the possible causes.
P0470 - Exhaust back pressure sensor circuit malfunction - Biased sensor, open signal return
P0478 - Exhaust pressure control valve high input - Plugged sensor line, stuck butterfly, restricted exhaust

Do you have a catalytic converter? Could it be clogged?
Is the Exhaust Back Pressure Valve stuck shut or partly shut?
Reply With Quote Quick reply to this message
  #4  
Old 02-22-2012, 02:17 PM
the baconator
 

Join Date: May 2009
Location: Easton MD 21601
Posts: 10,978
Thanks: 5
Thanked 35 Times in 35 Posts
Feedback Score: 1 reviews
both codes have to do with the exhaust back pressure valve

P0470 Backpressure Sensor Circuit Error
P0478 Exhaust Pressure Control Valve High Input

your EBPV maybe closed/or closing and choking the motor.
Reply With Quote Quick reply to this message
  #5  
Old 02-22-2012, 02:18 PM
the baconator
 

Join Date: May 2009
Location: Easton MD 21601
Posts: 10,978
Thanks: 5
Thanked 35 Times in 35 Posts
Feedback Score: 1 reviews
looks like i am slow to the party
Reply With Quote Quick reply to this message
  #6  
Old 02-22-2012, 02:25 PM
Compression Ignition Addict

 

Join Date: Mar 2010
Location: hoquiam, wa
Posts: 852
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
try unplugging your ebpv and see if that helps. That would be the first thing i did before i went out and spent money on some new sensors for that whole thing.
Reply With Quote Quick reply to this message
  #7  
Old 02-22-2012, 06:02 PM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Will have time to try to unplug the ebpv tube in the morning thanks for the help still wondering if screen in fuel take is plugging
Reply With Quote Quick reply to this message
  #8  
Old 02-22-2012, 06:47 PM
Banned
 

Join Date: Jan 2011
Location: Maine
Posts: 4,240
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 5 reviews
Send a message via Skype™ to ToMang07
Quote:
Originally Posted by tractor69 View Post
Will have time to try to unplug the ebpv tube in the morning thanks for the help still wondering if screen in fuel take is plugging
There is a difference between the EBV and the EBPS.

The EBV is the solenoid in the pedestal under the turbo, than closes the valve in the exhaust housing creating pressure on the turbo/engine. (This is what to unplug with the truck cold/off.)

EBPS is a sensor that measures the back-pressure in the exhaust, and is needed for optimal running/fuel management. (DO NOT UNPLUG!)

When the engine runs poorly... does it seem like he whole thing or just one side?

Pull your ICP plug too, and check for signs of oil on the plug/harness.


Reply With Quote Quick reply to this message
  #9  
Old 02-24-2012, 06:17 AM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
sick 7.3

Truck is at my farm about 90 miles away will try to work on over weekend. The truck seems to run poorly on both sides as in starved for fuel or air I really appreate the help and support form all. I did pull the ICP plug and it was clean and dry no oil.
Thanks I will get back to all when we get it figured out.
Terry
Reply With Quote Quick reply to this message
  #10  
Old 02-25-2012, 02:03 PM
Powerstroke.org Rookie
 

Join Date: Oct 2011
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
sick 7.3

Tomang07 you nailed it unhooked the sensor under the turbo and runs way better seem a little doggy. Will replace the sensor when I can get one I have a question Ford $185 or Orellieys $105 ? I guess they need a power stroke for dummies all the abbrebiations lose me so thanks for spelling it out for me.
Thanks
Terry
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 12:03 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