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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van SPONSORED BY:

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  #46  
Old 10-04-2009, 09:37 PM
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Hey bismic

I got the latest flash Ford had as of 04/28/09. Not sure of any test I can do othe than an injector test and monitoring the input and out put volts of the FICM. The input V is 12-13 and output is almost steady at 48v. Still not sure what my ICP pressures should be at idle and WOT or what the IPR duty cycle should be in both cases.
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  #47  
Old 10-04-2009, 09:40 PM
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Since you are having trouble w/ starts (and not really experiencing driving performance issues), then it would seem to me that your issue is not w/ the HPO system - assuming the ICP pressure is 685 at start-up.
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  #48  
Old 10-04-2009, 09:46 PM
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Thats true.....But it has been suggested I may have a slow leak in the HPO system that after sitting for a few days, lets a little air into the system. The codes That I did find(cam and crank sensors) have been removed and I am waiting to see if they return after a couple more drive cycles.
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  #49  
Old 01-13-2010, 03:06 PM
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Any further info on this problem?? I have the same symptoms... I have used a data capture tool to determine that my ICP pressure sits at almost zero for about 3.5 seconds, then jumps up rapidly and the truck starts. After running for a minute it will restart quickly... but if the truck sits for 5-6 hours it will crank 3-4 seconds again before building ICP high enough to start.

I suspect a HPO leak somewhere that allows drain back after sitting for a while, then it takes a few seconds to purge/compress the air in the system before building enough pressure to start.

(My truck is an 07 F350)
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  #50  
Old 01-27-2010, 09:08 AM
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Update... they (finally) listened to what I was telling them and found a bad o-ring under the valve cover... said it was melted!?!?

They also replaced #2 fuel injector.

Problem solved.
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  #51  
Old 01-27-2010, 09:59 AM
utjer utjer is offline
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Thanks for posting the resolution. I am glad they got you up and running.
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  #52  
Old 01-27-2010, 10:05 AM
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I still have not located my problem yet. I have captured my data also and the ICP pressure comes up to 600+ as soon as I hit the key. FICM volts at 47. I may have some sticky injectors.
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  #53  
Old 01-27-2010, 10:46 AM
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eddiedebb,

Have you tried performing a power balance test with the AE? If you do have injector problems, this may give you some data to work with.

I would say that a HPO problem is unlikely if you have 600+ psi right away when you are experiencing a hard start. Did you actually capture this 600+ psi during a hard start?
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  #54  
Old 01-27-2010, 10:51 AM
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Not sure how to perform a power balance test. Yes I have recorded the data during a hard start and plan to do this again soon. The problem has not gotten any worst but it may be possible that The data may have changed.
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  #55  
Old 01-27-2010, 10:56 AM
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I don't know how to do a power balance test with the AE (or any tool for that matter), but it's a free test considering that you already have the AE! See if you can find some details on how to do one... esentially it kills one cylinder at a time while the engine is running and it measures the changes in engine output, if all cylinders are contributing equally then the change should be identical when each cylinder is "killed". If there are problems, then the imbalances should show up.

also, this may be a shot in the dark, but you may be able to temporarily (or permanently?) hide some injector problems by adding a lubricity improver to your fuel. It would be a cheap and harmless test anyway to see if it has any effect.

One of the Ford additives, or Stanadyne would be fine. I've been adding this to every tank of my fuel for the past 10,000kms without any immediate problems:

http://www.renewablelube.com/pdf/2C-...20Cond.doc.pdf
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  #56  
Old 01-27-2010, 11:41 AM
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I've been looking for a reference to the power balance test procedure on a 6.0 using the AE... and it's looking like you can't do it, although I did find a few references where folks said you could. Here is the most authoritative thing I found:

ITP Powerstroke Diagnostic Hints
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  #57  
Old 01-27-2010, 12:00 PM
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Thanks dbenson. I have never found a way to do a power balance but maybe there is. That is also about the only link I have found also.
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Old 01-27-2010, 12:00 PM
 
 
 
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