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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

Missing when below operating temp.

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Old Oct 15, 2012 | 03:29 PM
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Missing when below operating temp.

I have been noticing that my truck (108000 miles) has been missing and running rough (somtimes even surging) untill the engine warms up (eot above 160) Any idea on what could be causing this?

FICM readings are all good, batteries are new. This will happen when i start the truck in the morning and its in the 40s or if I park it for an hour and it just cooled off a little.

thanks for your help.
 
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Old Oct 15, 2012 | 03:31 PM
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I forgot to mention the truck is not showing any codes.
 
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Old Oct 15, 2012 | 03:45 PM
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If the truck runs rough when cold but gets betters or even clears up completely once it's up to full operating temperatures I would suspect an injector issue. Unfortunately, this is quite common with the 6.0L platform, it could be a problem with just one injector or multiple units...
 
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Old Oct 15, 2012 | 04:05 PM
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thanks that is kinda what I was thinking. it does get 100 percent better once it reaches operation temp. Shouldnt a bad injector throw a code?
 
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Old Oct 15, 2012 | 04:34 PM
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What's your fuel pressure?
 
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Old Oct 15, 2012 | 05:00 PM
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Make sure your oil is changed at the proper intervals and that you are using Motorcraft oil filters. Some people have found that a 5W40 oil and RevX or Archoil has helped injector stiction issues.
 
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Old Oct 15, 2012 | 09:20 PM
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Check FICM volts under load (going up a hill)
 
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Old Oct 15, 2012 | 09:36 PM
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Worn inject Orings will cause this issue to

Does your oil smell like diesel Fuel

Watch it over time to see if your Making oil

The Orings will leak fuel untill truck warms up and things expand and seal
 
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Old Oct 16, 2012 | 07:01 AM
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From: the woodzies
Originally Posted by BPofMD
What's your fuel pressure?
fuel pressure is 62 and will drop to 58 when accellerating hard towing 10K

I have noticed that when it is cold (not at operating temp) my fuel pressure seems to bounce around.

also this morning when I started the truck it ran fine for the first 30 seconds then it started to miss slightly/shake/run rough
 
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Old Oct 16, 2012 | 07:04 AM
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Originally Posted by bismic
Make sure your oil is changed at the proper intervals and that you are using Motorcraft oil filters. Some people have fond that a 5W40 oi and RevX or Archoil has helped injector stiction issues.
oils is changed every 5000 miles with 5w40 with valvoilne I also have a bypass oil filter and use motorcraft oil filter
 
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Old Oct 16, 2012 | 07:05 AM
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Originally Posted by Fal-308-Win
Check FICM volts under load (going up a hill)
i check them pulling my goosneck loaded with my trractor and the readings were right on the money
 
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Old Oct 16, 2012 | 07:07 AM
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From: the woodzies
Originally Posted by BLADE35
Worn inject Orings will cause this issue to

Does your oil smell like diesel Fuel

Watch it over time to see if your Making oil

The Orings will leak fuel untill truck warms up and things expand and seal
I will definatly check into this I have not noticed the oil level rising but i really dont pay attention to it rising either, i just make sure its not low
 
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Old Oct 16, 2012 | 12:32 PM
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So is there any way to tell which injectors are being problematic? Once I am done work I will check the oil to see if the level has risen or if it smells like diesel.

thanks!
 
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Old Oct 16, 2012 | 09:00 PM
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I checked the oil and didnt smell any real strong diesel scent, I then checked the oil level and it seemed like it might be a little high. I do have almost 4000 miles on this oil.
 
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Old Oct 16, 2012 | 09:23 PM
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Could also try a bubble test. Tell you if there is bad injector seals.
 
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