03, No start, ICP low, dies when brake applied - 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 02-24-2012, 11:08 AM
Compression Ignition Addict
 
Join Date: Dec 2007
Location: Grimes, Iowa
Posts: 693
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
03, No start, ICP low, dies when brake applied

03, 200k miles, truck never died while driving just simply quit starting, give it a little shot of starting fluid and it will start after a bit of cranking, got an ICP circuit signal fault, noticed of the scan tool the desired ICP and actual were good, although zero voltage from the ICP, i pulled the wires from the IPR and noticed the casing from the two wires where pulled out of the pig tail and they were actually twisted making contact with each other,

while messing with that plug to the IPR the ICP plug popped with no effort at all so i made the assumption that it wasnt plugged in properly and was not latched,

So i shrinked the wires on the IPR harness and re-installed both plugs making sure the ICP plug snapped correctly into place, still no start without starting fluid,

got the truck running again and watched the scan tool while running to monitor the ICP and desired value and actual value were always within a few PSI of each other, so i assume thats all good, ICP voltage had a range from .98 to 1.15v and would peak at about 1.25v when accelerator applied,

truck sat and idled ran through self test a few times, revved it up to 3500rpm held just fine, stalled it up to 2000rpm and held just fine, but if you press and hold the brake pedal at idle the truck will surge untill it dies, if you left off soon enough it will recover but if you hold the brake pedal it will die,

still has p2285 low ICP circuit and p2291 low ICP while cranking, theres also a fan circuit signal fault, water in fuel, think thats it.

for the record this is a buddies truck! I dont believe he knows much about maintenance on a diesel, he just changes the oil and drives it, usually hauling horses long distance.. any ideas? thanks!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 02-24-2012, 11:44 AM
Compression Ignition Addict
 

Join Date: Jun 2011
Posts: 200
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Usually on the 03's that code is saying the ICP sensor is bad, when you had the connector unplugged was it oil soaked? Generally the sensor pops and oil pushes through the sensor into the harness. I usually install a new sensor and new pigtail when this happens. Just something to check.
Reply With Quote Quick reply to this message
  #3  
Old 02-24-2012, 01:31 PM
Compression Ignition Addict
 

Join Date: Dec 2008
Location: port arthur texas
Posts: 3,461
Thanks: 0
Thanked 18 Times in 18 Posts
Feedback Score: 0 reviews
If the PCM looses signal from the sensor it defaults to a preset value so that the truck can start if everything else is good. You were seeing the default values and not actual pressure. Your actual pressure is probablly just below the threshold. When it cranks up on either it runs for several seconds much faster than the starter can spin it, this turns the pump fast enough to build enough pressure to actually operate the injectors and allow it to start and run on its own.
Reply With Quote Quick reply to this message
  #4  
Old 02-24-2012, 01:41 PM
Compression Ignition Addict
 

Join Date: Jun 2011
Posts: 200
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Sorry but either im really hungover yet or I dont get what your trying to say? What runs much faster then the starter can spin it? The pump is ran off the cam gear which is run off the crank which is spun by the starter cranking. So like I said either im reading what you posted wrong or you talking about something completely different? They way ive always understood it that is with the ICP disconnected it deadheads the HPOP for maximum output. Im probably wrong on this so im not arguing just always willing to learn and understand something a bit better. In this case im still suspecting the ICP sensor with that code and the year of truck it is.
Reply With Quote Quick reply to this message
  #5  
Old 02-24-2012, 01:56 PM
Compression Ignition Addict
 

Join Date: Dec 2008
Location: port arthur texas
Posts: 3,461
Thanks: 0
Thanked 18 Times in 18 Posts
Feedback Score: 0 reviews
You say you get it to start with either, well when its running it will turn over a lot faster which in turn turns everything else faster. Imean it cranks at about 150 rpm it runs at idle about 900 rpm. I was offering an altenative explanation. The ICP sensor mmay or mmay nnoot be good but im pretty shue the plug and pig tail is the problem.

I may have made too much of the fact you stated that even with starting fluid it had to crank a bit. With starting flluid they useually lite off pretty quick
Reply With Quote Quick reply to this message
  #6  
Old 02-24-2012, 02:00 PM
Compression Ignition Addict
 
Join Date: Dec 2007
Location: Grimes, Iowa
Posts: 693
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Either or starting fluid helps the engine combust just enough to spin the motor fast enough to allow it to fire, although I thought this was consistant with a hpo leak, noot bad sensor, and the values I read the actual was within a few hundred psi, usually slightly less than desired sometimes read more, it remained close but not exact with veryable readings, my scan tool reads desired when cranking at 14500psi, I wonder if it isn't reading to the tenth and its actually 1450psi,
Reply With Quote Quick reply to this message
  #7  
Old 02-24-2012, 02:27 PM
Turbos = Witchcraft
 

Join Date: Jul 2011
Location: West Bend, WI
Posts: 2,835
Thanks: 2
Thanked 29 Times in 14 Posts
Feedback Score: 3 reviews
Have you tried to unplug the ICP and start it? With the ICP unplugged, the truck will assume a default value and the truck will start, assuming there is actually enough pressure and teh ICP is just bad. I may have missed it, but did you see any oil on the ICP plug? The other thing to check would be the IPR screen, it may be clogged and not allowing you to build enough pressure.
Reply With Quote Quick reply to this message
  #8  
Old 02-24-2012, 02:31 PM
Compression Ignition Addict
 

Join Date: Dec 2008
Location: port arthur texas
Posts: 3,461
Thanks: 0
Thanked 18 Times in 18 Posts
Feedback Score: 0 reviews
This is one of those cases where the only real way to tell ifits sensor or actual pressure loss is to install a suitable mechanical gauge and see what actual pressure is being put out
Reply With Quote Quick reply to this message
  #9  
Old 02-25-2012, 08:19 PM
Compression Ignition Addict
 
Join Date: Dec 2007
Location: Grimes, Iowa
Posts: 693
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Ok little update, went out this am and gave the truck a shot of starting fluid and she fired up just fine, ran an idled great, I moniterd every thing the whole time and readings were good, BTW is discovered my scanner was displaying kPsi, which is why I was showing 14500 as desired, got that switched over to PSI. Truck ran great and no longer died when the brake was depressed,

Anyways drove the truck about a mile down the road to a buddies and it held wot just fine, I stopped over at a buddies place and let it idle for a good 20min, went to take off and mashed the brake pedal to test that it no longer died and it suged and died!

Even with starting fluid the truck would not fire, I made the assumtion that it must have a hpo leak and the hot oil would not allow it to fire, also scan tool read max pressure at 98PSI, so waited and hour(20 degrees out today) and tried again, no fire this time barly broke 200PSI, waited another 2guy hours, no go, max pressur 154PSI,

Towed the truck home and began tear down to open the hpop cover and discovered my shrink tubing had pulled out again of the IPR pig tail and had twisted making contact, also got a much better look at the ICP and it is in fact very oil soaked! Problem solved?
Reply With Quote Quick reply to this message
  #10  
Old 02-25-2012, 08:26 PM
Turbos = Witchcraft
 

Join Date: Jul 2011
Location: West Bend, WI
Posts: 2,835
Thanks: 2
Thanked 29 Times in 14 Posts
Feedback Score: 3 reviews
Quite possibly. Replace the ICP and pigtail. That should fix it
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 05:49 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