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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 12-13-2012, 05:23 PM   #1 (permalink)
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starts fine cold

2003 6.0 146000 miles,as it warms up misses and eventually dies,then have to wait till it cools to restart.what should i check and test?

Last edited by markgyver; 12-18-2012 at 01:17 PM.
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Old 12-13-2012, 05:35 PM   #2 (permalink)
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Welcome... Do you have a way to pull codes/ or have Scangage2 or Edge Insight etc to post icp / ipr readings?... What oil filter/oil maint. history/ miles on the oil?... See bismic's no start sticky first...b
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Last edited by 03powerstrokeuser; 12-13-2012 at 05:36 PM. Reason: add info
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Old 12-13-2012, 06:13 PM   #3 (permalink)
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no scanner as of yet,ive had it about a year,changed oil every 5000,changed fuel filters today.
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Old 12-13-2012, 06:47 PM   #4 (permalink)
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See if you can get hold of a code reader/friend or chain auto store to pull basic codes? Without these you will need to take it to the Ford guys to get it diagnosed. Did you use oem/racor filters= all important?...b
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Old 12-13-2012, 09:29 PM   #5 (permalink)
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yes ,motorcraft filters
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Old 12-18-2012, 01:43 PM   #6 (permalink)
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Redid the bubble in fuel bowl test,sure enough,bubbles were flowing,unhooked pass side fuel line at head,rechecked no bubbles.so what do ya think an inj oring or injector itself/ thanks for the help.
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Old 12-27-2012, 06:08 PM   #7 (permalink)
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So today i replaced 2 injectors( had already replaced the other 2 a year ago).still getting the air bubbles back into the fuel cup.truck starts good cold runs smooth as glass for 5 minutes or so.so i guess i have to replace the 2 injectors that i replaced a year ago.

added scan guage hpop is 800-900, fuel pressure is about 48. ficm varies i seen as low as 44.5 for a second but mostly 47-48

Last edited by markgyver; 12-27-2012 at 06:14 PM.
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Old 12-27-2012, 06:33 PM   #8 (permalink)
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IMO that fuel pressure is too low and your FICM is on the way out.
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Old 12-27-2012, 06:41 PM   #9 (permalink)
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so i need the blue spring update and a ficm,but neither one of these accounts for the air bubbles in the fuel bowl or would it affect an injecter sticking?
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Old 12-27-2012, 07:44 PM   #10 (permalink)
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No, it seems you have multiple issues unfortunately. Ed at FICMrepair.com can get your FICM issues addressed for $250 - $350 (better than new).

IIRC Ford states that it is common to end up changing out the entire bank if one injector has allowed combustion gasses to back pressure into the fuel.
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Old 12-27-2012, 08:45 PM   #11 (permalink)
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Thank you for the reply's. i thought i may have to replace the 4 injectors but i was trying to cheap out, just got laid off a week ago so cash is tight.will replace the other 2 injectors tomorrow. and ficm asap.
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Old 12-28-2012, 09:28 AM   #12 (permalink)
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UPDATE.......... When you do the bubble test make sure you block off fuel line from other side.bubbles will go right through fuel bowl and down fuel line to the head and out.giving false impression that you have located which bank has the leak. I've been working on the wrong side. until i took lines off at bowl and blocked with finger did i see what was happening.
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Old 12-28-2012, 11:50 AM   #13 (permalink)
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This is what I found

starts fine cold-001.jpg


so i had 3 injector orings blown or sucked out,

Last edited by markgyver; 12-28-2012 at 07:24 PM.
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Old 12-28-2012, 12:38 PM   #14 (permalink)
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Looks like 7.3 injectors to me
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Old 12-28-2012, 12:48 PM   #15 (permalink)
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Quote:
Originally Posted by Paul H View Post
Looks like 7.3 injectors to me
Close but not quite. The 7.3 injectors don't have that screened port.
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