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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

One cyliner missfire

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Old Feb 1, 2013 | 04:34 PM
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One cyliner missfire

03 f250 6.0 when first started in the morning runs smooth for about 10-15 second and then starts missing. This only happening on idle, when reved up miss goes away. Traced to #2 cylinder by disconnecting injectors one by one. There is no smoke out of the tailpipe. Has anybody had that problem before? Is there any connection to hard start condition when hot, or I have to separate issues?
 
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Old Feb 1, 2013 | 05:02 PM
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do you have hard hot starts????

Could be relaited IDK

That top inject oring could be blown

Whats the FICM Volts look like
 
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Old Feb 1, 2013 | 05:08 PM
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FICM is 48.0V and steady. I have that injector out and looks like top oring is OK and slides snugly over oil gallery nipple.
 
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Old Feb 1, 2013 | 06:06 PM
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OH you already pulled the injector


Well the next thing would have been to do a Bubble test But since its Out

are you just going to throw a new Stick in???
 
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Old Feb 2, 2013 | 12:45 PM
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Originally Posted by BLADE35
do you have hard hot starts????

Could be relaited IDK

That top inject oring could be blown

Whats the FICM Volts look like
Witch O-ring you referring to. One inside injector hole,
or one by the nipple when mounted in oil gallery?
BTW , how do you remove that nipple? Any special tool is required? should I even go there?
 
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Old Feb 2, 2013 | 01:17 PM
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Originally Posted by dasio
Witch O-ring you referring to. One inside injector hole,
or one by the nipple when mounted in oil gallery?
BTW , how do you remove that nipple? Any special tool is required? should I even go there?
No dont go there

Any Oring on the Injector thats Bad would causea mis fire condition

Now that Its Out the Injector Put a Vac Pump over the Injector Tip it should Hold Vac prssure

And Ohm the Coils out with a DVM


Check for DTC
 
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